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MATHEMATICS INSTRUCTION FOR
STUDENTS WITH LEARNING DISABILITIES
OR DIFFICULTY LEARNING MATHEMATICS
A Guide for Teachers
MATHEMATICS INSTRUCTION FOR
STUDENTS WITH LEARNING DISABILITIES
OR DIFFICULTY LEARNING MATHEMATICS
A Guide for Teachers

Madhavi Jayanthi
Russell Gersten
Scott Baker
Instructional Research Group

2008
The authors would like to express their appreciation to Becky
Newman-Goncher and Kelly Haymond for their contributions to
this publication.

This publication was created for the Center on Instruction by
Instructional Research Group. The Center on Instruction is
operated by RMC Research Corporation in partnership with
the Florida Center for Reading Research at Florida State
University; Instructional Research Group; the Texas Institute for
Measurement, Evaluation, and Statistics at the University of
Houston; and the Meadows Center for Preventing Educational
Risk at the University of Texas at Austin.

The contents of this document were developed under
cooperative agreement S283B050034 with the U.S.
Department of Education. However, these contents do
not necessarily represent the policy of the Department of
Education, and you should not assume endorsement by the
Federal Government.

Editorial, design, and production services provides by
RMC Research Corporation.

Preferred citation:
Jayanthi, M., Gersten, R., Baker, S. (2008). Mathematics
instruction for students with learning disabilities or difficulty
learning mathematics: A guide for teachers. Portsmouth, NH:
RMC Research Corporation, Center on Instruction.




To download a copy of this document, visit www.centeroninstruction.org.
CONTENTS


 1   INTRODUCTION

 5   RECOMMENDATIONS

13   LIST OF RECOMMENDATIONS

14   REFERENCES




                               v
INTRODUCTION


Historically, mathe matics instruction for students with learning disabilities and
at-risk learners has not received the sam e level of consideration and scrutiny
from the research com munity, policy makers, and school administrators as the
field of reading. A recent revie w of the ERIC literature base (G ersten, Clarke, &
M azzocco, 2007) found that the ratio of studies on reading disabilities to
mathe matics disabilities and difficulties w as 5:1 for the years 1996–2005. This
w as a dramatic improve m ent over the ratio of 16:1 in the prior decade. Even
though this is far from a large body of research, sufficient studies exist to
dictate a course of action.
     Recently, the C enter on Instruction conducted a m eta-analysis on the topic
of teaching mathe matics to students with learning disabilities (G ersten, Chard,
Jayanthi, Baker, M orphy, & Flojo, 2008). A m eta-analysis is a statistical m ethod
by w hich research studies on a particular m ethod of instruction are sum marized
to determine the effectiveness of that instructional m ethod. A m eta-analysis
helps combine findings from disparate studies to determine the effectiveness
of a particular m ethod of instruction.
     In the m eta-analysis on teaching mathe matics to students with learning
disabilities (LD), only studies with randomized control trials (RCTs) and high
quality quasi-experim ental designs (Q E Ds) w ere included. In an RCT, the study
participants (or other units such as classrooms or schools) are randomly
assigned to the experim ental and control groups, w hereas in a Q E D, there
is no random assignm ent of participants to the groups.


Seven Effective Instructional Practices
Based on the findings of the m eta-analysis report, seven effective instructional
practices w ere identified for teaching mathe matics to K–12 students with
learning disabilities. In describing these practices, w e have incorporated
recom m endations from The Final Report of the National M athe matics Advisory
Panel (National M athe matics Advisory Panel, 2008) as w ell. This report
specified recom m endations for students with learning disabilities and for
students w ho w ere experiencing difficulties in learning mathe matics but w ere
not identified as having a math learning disability (i.e., at-risk). The seven




                                                                                      1
effective instructional practices in this docum ent are supported by current
    research findings. O ther instructional practices may be effective, but there is, at
    present, not enough high quality research to recom m end their use at this tim e.
        Som e of the recom m endations listed later in this docum ent (e.g., teach
    explicitly and use visuals) are age-old teaching practices. W hile there is nothing
    ne w about these practices, research continues to validate the m as effective
    instructional practices for students with learning disabilities and at-risk students,
    and continued use is w arranted. O ther instructional m ethods recom m ended
    here, such as using multiple instructional examples and teaching multiple
    strategies, have also be en endorsed in studies that focused on reform-oriented
    mathe matics instruction in general education classes (e.g., Silver, Ghousseini,
    Gosen, Charalambous, & Stra w hun, 2005; Rittle-Johnson & Star, 2007). This
    alignm ent of teaching m ethods bet w e en special education and general
    education enables students with learning disabilities to learn m eaningfully
    from general education curricula in inclusive classrooms.


    Mathematical Knowledge
    Current mathe matics researchers e mphasize thre e areas of mathe matical
    abilities (e.g., Kilpatrick, S w afford, & Findell, 2001; Rittle-Johnson & Star, 2007;
    Bottge, Rueda, LaRoque, Serlin, & K w on, 2007). They are:
     • procedural kno wledge,
     • procedural flexibility, and
     • conceptual kno wledge.
    Procedural kno wledge refers to kno wledge of basic skills or the sequence
    of steps ne eded to solve a math proble m. Procedural kno wledge enables a
    student to execute the necessary action sequences to solve proble ms (Rittle-
    Johnson & Star, 2007).
        Procedural flexibility refers to kno wing the many different w ays in w hich
    a particular proble m can be solved. Students with a good sense of procedural
    flexibility kno w that a given proble m can be solved in more than one w ay,
    and can solve an unkno w n proble m by figuring out a possible solution for
    that proble m.




2
Conceptual kno wledge is a grasp of the mathe matical concepts and ideas
that are not proble m-specific and therefore can be applied to any proble m-
solving situation. Conceptual understanding is the over-arching understanding
of mathe matical concepts and ideas that one often refers to as a “ good
mathe matical sense. ”
    It is reasonable to extrapolate from this small but important body of
research that such an e mphasis w ould also benefit students with disabilities
and at-risk students. Recent studies have atte mpted to address reform-oriented
math instruction in special education settings. Researchers such as Wood w ard
(e.g., Wood w ard, M onroe, & Baxter, 2001) and Van Luit (Van Luit & Naglieri,
1999) have endeavored to address the issue of procedural flexibility in their
research by focusing on multiple strategy instruction—a recom m endation in
this docum ent, as m entioned earlier. Bottge (e.g., Bottge, H einrichs, M ehta, &
Hung, 2002) has addressed the issue of procedural kno wledge and conceptual
understanding by m eans of engaging, real-life, m eaningful proble m-solving
contexts; ho w ever the limited number of studies precludes any
recom m endations at this tim e.


Effective Instruction at Each Tier
The current focus on Response to Intervention (RTI) as a tiered prevention and
intervention model for struggling mathe matics learners also calls for evidence-
based instructional m ethods (Bryant & Bryant, 2008). W hile RTI models can
have thre e or more tiers (the most com mon being thre e tiers), they all share
the sam e objectives. For example, Tier 1 instruction, with an e mphasis on
primary prevention, requires teachers to provide evidence-based instruction
to all students. Tier 2 focuses on supple m ental instruction that provides
differentiated instruction to m e et the learning ne eds of students. Tier 3
e mphasizes individualized intensive instruction. The ultimate goal of the RTI
model is to reduce the number of students in successive tiers and the number
of students receiving intensive instruction. The ground w ork for the success
of this model is the effectiveness of the instruction provided in Tier 1.The
evidence-based instructional strategies identified in this docum ent ne ed
to be part of the teaching repertoire of Tier 1 teachers. These validated
techniques, w hen imple m ented soundly, can effectively bring about student
gains in mathe matics.




                                                                                     3
O ur docum ent guides K–12 teachers of students with disabilities and at-risk
    students in their selection and use of effective mathe matics instructional
    m ethods. For each of the seven recom m endations, w e explain w hat w orks,
    describe ho w the practice should be done, and sum marize the evidence
    supporting the recom m endation.




4
RECOMMENDATIONS

Recommendation 1:
Teach students using explicit instruction on a regular basis.
Explicit instruction, a mainstay feature in many special education programs, includes teaching
components such as:
 • clear modeling of the solution specific to the proble m,
 • thinking the specific steps aloud during modeling,
 • presenting multiple examples of the proble m and applying the solution to the proble ms, and
 • providing im m ediate corrective fe edback to the students on their accuracy.
W hen teaching a ne w procedure or concept, teachers should begin by modeling and/or thinking
aloud and w orking through several examples. The teacher e mphasizes student proble m solving
using the modeled m ethod, or by using a model that is consonant with solid mathe matical
reasoning. W hile modeling the steps in the proble m (on a board or overhead), the teacher should
verbalize the procedures, note the symbols used and w hat they m ean, and explain any decision
making and thinking processes (for example, “ That is a plus sign. That m eans I should…”).
    Teachers should model several proble ms with different characteristics (Rittle-Johnson & Star,
2007; Silbert, Carnine, & Stein, 1989). A critical technique is assisted learning w here students
w ork in pairs or small groups and receive guidance from the teacher. During initial learning and
practice, the teacher provides im m ediate fe edback to prevent mistakes in learning and allo w s
students to ask questions for clarification.
    According to The Final Report of the National M athe matics Advisory Panel (National
M athe matics Advisory Panel, 2008), explicit syste matic instruction improves the performance of
students with learning disabilities and students with learning difficulties in computation, w ord
proble ms, and transferring kno w n skills to novel situations. Ho w ever, the panel noted that w hile
explicit instruction has consistently sho w n better results, no evidence supports its exclusive use
for teaching students with learning disabilities and difficulties. The panel recom m ends that all
teachers of students with learning disabilities and difficulties teach explicitly and syste matically on
a regular basis to som e extent and not necessarily all the tim e.



   Summary of Evidence to Support Recommendation 1
   Meta-analysis of Mathematics Intervention Research for Students with LD
   C OI examined 11 studies in the area of explicit instruction (10 RCTs and 1 Q E D). The m ean effect
   size of 1.22 w as statistically significant (p < .001; 95 % CI = 0.78 to 1.67).

   National Mathematics Advisory Panel
   The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches for
   students with learning disabilities and lo w-achieving students. Explicit Syste matic Instruction is
   identified in The Final Report of the National M athe matics Advisory Panel as one of the defining
   features of effective instruction for students with learning disabilities (National M athe matics
   Advisory Panel, 2008).

   RCT = Randomized control trial. QED = Quasi-experimental design. CI= Confidence interval.

                                                                                                           5
Recommendation 2:
    Teach students using multiple instructional examples.
    Example selection in teaching ne w math skills and concepts is a se minal idea that is strongly
    e mphasized in the effective instruction literature (e.g., M a, 1999; Rittle-Johnson & Star, 2007;
    Silbert, Carnine, & Stein, 1989). Teachers ne ed to spend som e tim e planning their mathe matics
    instruction, particularly focusing on selecting and sequencing their instructional examples. The
    goal is to select a range of multiple examples of a proble m type. The underlying intent is to
    expose students to many of the possible variations and at the sam e tim e highlight the com mon
    but critical features of se e mingly disparate proble ms. For example, w hile teaching students to
    divide a given unit into half, a variety of proble ms can be presented that differ in the w ay the
    critical task of half is addressed in the proble ms (i.e., use the symbol for half; use the w ord half,
    use the w ord one-half; etc.) (O w en & Fuchs, 2002).
         M ultiple examples can be presented in a specified sequence or pattern such as concrete to
    abstract, easy to hard, and simple to complex. For example, fractions and algebraic equations can
    be taught first with concrete examples, then with pictorial representations, and finally in an
    abstract manner (Butler, Miller, Crehan, Babbitt, & Pierce, 2003; Witzel, M ercer, Miller, 2003).
    M ultiple examples can also be presented by syste matically varying the range presented (e.g.,
    initially teaching only proper fractions vs. initially teaching both proper and improper fractions).
         Sequencing of examples may be most important during early acquisition of ne w skills w hen
    scaffolding is ne eded for student mastery and success. The range of examples taught is probably
    most critical to support transfer of learned skills to ne w situations and proble ms. In other w ords, if
    the teacher teaches a wide range of examples, it will result in the learner being able to apply a
    skill to a wider range of proble m types. Both of these planning devices (sequence and range)
    should be considered carefully w hen teaching students with LD.



       Summary of Evidence to Support Recommendation 2
       Meta-analysis of Mathematics Intervention Research for Students with LD
       C OI examined 9 studies on range and sequence of examples (all RCTs). The m ean effect size of
       0.82 w as statistically significant (p < .001; 95 % CI = 0.42 to 1.21).

       National Mathematics Advisory Panel
       The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches
       for students with learning disabilities and lo w-achieving students. The panel recom m ends that
       teachers, as part of explicit instruction, carefully sequence proble ms to highlight the critical features
       of the proble m type (National M athe matics Advisory Panel, 2008).




6
Recommendation 3:
Have students verbalize decisions and solutions to a math problem.
Encouraging students to verbalize, or think-aloud, their decisions and solutions to a math proble m
is an essential aspect of scaffolded instruction (Palincsar, 1986). Student verbalizations can be
proble m-specific or generic. Students can verbalize the specific steps that lead to the solution of
the proble m (e.g., I ne ed to divide by t w o to get half) or they can verbalize generic heuristic steps
that are com mon to proble ms (e.g., No w I ne ed to check my ans w er). Students can verbalize the
steps in a solution format (First add the numbers in the units column. Write do w n the ans w er.
Then add numbers in the tens column…) (Tournaki, 2003) or in a self-questioning/ans w er format
(W hat should I do first? I should…) (Pavchinski, 1998). Students can verbalize during initial
learning or as they are solving, or have solved, the proble m.
    M any students with learning disabilities are impulsive behaviorally and w hen faced with multi-
step proble ms frequently atte mpt to solve the proble ms by randomly combining numbers rather
than imple m enting a solution strategy step-by-step. Verbalization may help to anchor skills and
strategies both behaviorally and mathe matically. Verbalizing steps in proble m solving may address
students’ impulsivity directly, thus suggesting that verbalization may facilitate students’ self-
regulation during proble m solving.



   Summary of Evidence to Support Recommendation 3
   Meta-analysis of Mathematics Intervention Research for Students with LD
    C OI examined 8 studies in the area of student verbalizations (7 RCTs and 1 Q E D). The m ean effect
    size of 1.04 w as statistically significant (p < .001; 95 % CI = 0.42 to 1.66).

   National Mathematics Advisory Panel
   The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches
   for students with learning disabilities and lo w-achieving students. The panel recom m ends that
   teachers, as part of explicit instruction, allo w students to think aloud about the decisions they make
   w hile solving proble ms (National M athe matics Advisory Panel, 2008).




                                                                                                             7
Recommendation 4:
    Teach students to visually represent the information in the math problem.
    Visual representations (dra wings, graphic representations) have be en used intuitively by teachers
    to explain and clarify proble ms and by students to understand and simplify proble ms. W hen used
    syste matically, visuals have positive benefits on students’ mathe matic performance.
        Visual representations result in better gains under certain conditions. Visuals are more
    effective w hen combined with explicit instruction. For example, teachers can explicitly teach
    students to use a strategy based on visuals (O w en & Fuchs, 2002). Also, students benefit more
    w hen they use a visual representation prescribed by the teacher rather than one that they self-
    select (D. Baker, 1992). Furthermore, visuals that are designed specifically to address a particular
    proble m type are more effective than those that are not proble m specific (Xin, Jitendra, &
    D eatline-Buchman, 2005). For example, in the study by Xin and her colleagues, students first
    identified w hat type of proble m they had be en given (e.g., proportion, multiplicative) and then
    used a corresponding diagram (taught to the m) to represent essential information and the
    mathe matical procedure necessary to find the unkno w n. Then they translated the diagram
    into a math sentence and solved it.
        Finally, visual representations are more beneficial if not only the teacher, but both the teacher
    and the students use the visuals (M analo, Bunnell, & Stillman, 2000).



       Summary of Evidence to Support Recommendation 4
       Meta-analysis of Mathematics Intervention Research for Students with LD
       C OI examined 12 studies on visual representations (11 RCTs and 1 Q E D). The m ean effect size of
       0.47 w as statistically significant (p < .001; 95 % CI = 0.25 to 0.70).

       National Mathematics Advisory Panel
       The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches
       for students with learning disabilities and lo w-achieving students. According to The Final Report
       of the National M athe matics Advisory Panel visual representations w hen combined with explicit
       instruction tended to produce significant positive results (National M athe matics Advisory
       Panel, 2008).




8
Recommendation 5:
Teach students to solve problems using multiple/heuristic strategies.
Instruction in multiple/heuristic strategies is part of a conte mporary trend in mathe matics
education (e.g., Star & Rittle-Johnson, in press). Using heuristics sho w s som e promise with
students with learning disabilities. M ultiple/heuristic strategy instruction has be en used in
addressing computational skills, proble m solving, and fractions.
    A heuristic is a m ethod or strategy that exe mplifies a generic approach for solving a proble m.
For example, a heuristic strategy can include steps such as “ Read the proble m. Highlight the key
w ords. Solve the proble ms. Check your w ork. ” Instruction in heuristics, unlike direct instruction,
is not proble m-specific. H euristics can be used in organizing information and solving a range of
math proble ms. They usually include student discourse and reflection on evaluating the alternate
solutions and finally selecting a solution for solving the proble m. For example, in the Van Luit and
Naglieri (1991) study, the teacher first modeled several strategies for solving a computational
proble m. Ho w ever, for most of the lesson, the teacher’s task w as to lead the discussion in the
direction of using strategies and to facilitate the discussion of the solutions provided by the
students. Each student w as fre e to select a strategy for use, but the teacher assisted the children
in discussion and reflection about the choices made.
    Similarly, in the Wood w ard (2006) study, students w ere taught multiple fact strategies. Daily
lessons consisted of introduction of ne w strategies or revie w of old strategies. Students w ere not
required to m e morize the strategies. They w ere, ho w ever, encouraged to discuss the strategy
and contrast it with previously taught strategies. For example, students w ere sho w n that since 9
X 5 has the sam e value as 5 X 9, they w ere fre e to treat the proble m as either nine fives or five
nines. They also w ere sho w n that this w as equivalent to 10 fives minus one five, and that this
could be a faster w ay to do this proble m m entally. Thus a variety of options w ere discussed with
the students.



   Summary of Evidence to Support Recommendation 5
   Meta-analysis of Mathematics Intervention Research for Students with LD
   C OI examined 4 studies in the area of multiple/heuristic strategy instruction (3 RCTs and 1 Q E D).
   The m ean effect size of 1.56 w as statistically significant (p < .001; 95 % CI = 0.65 to 2.47).




                                                                                                          9
Recommendation 6:
     Provide ongoing formative assessment data and feedback to teachers.
     O ngoing formative assessm ent and evaluation of students’ progress in mathe matics can help
     teachers m easure the pulse and rhythm of their students’ gro w th and also help the m fine-tune
     their instruction to m e et students’ ne eds. Teachers can administer assessm ents to their group
     of students and then a computer can provide the m with data depicting students’ current
     mathe matics abilities.
         Providing teachers with information regarding their students’ progress in mathe matics has
     beneficial effects on the mathe matics performance of those sam e students. Ho w ever, greater
     benefits on student performance will be observed if teachers are provided with not only
     performance fe edback information but also instructional tips and suggestions that can help
     teachers decide w hat to teach, w hen to introduce the next skill, and ho w to group/pair students.
     For example, teachers can be given a set of written questions to help the m use the formative
     assessm ent data for adapting and individualizing instruction. These written questions could
     include “ O n w hat skill(s) has the student improved compared to the previous t w o-w e ek period?”
     or “ Ho w will I atte mpt to improve student performance on the targeted skill(s)?”
         Teachers can respond to these questions and address the m again w hen ne w assessm ent
     data becom es available (Allinder, Bolling, O ats, & Gagnon, 2000). Teachers can also be provided
     with a specific set of recom m endations to address instructional planning issues such as w hich
     mathe matical skills require additional instructional tim e for the entire class, w hich students require
     additional help via som e sort of small group instruction or tutoring, and w hich topics should be
     included in small group instruction (Fuchs, Fuchs, Hamlett, Phillips, & B entz, 1994).



        Summary of Evidence to Support Recommendation 6
        Meta-analysis of Mathematics Intervention Research for Students with LD
        C OI examined 10 studies on formative assessm ent (all RCTs). The m ean effect size of 0.23 w as
        statistically significant (p < .01; 95 % CI = 0.05 to 0.41).

        National Mathematics Advisory Panel
        The panel revie w ed high quality studies on formative assessm ent and noted that formative
        assessm ent use by teachers results in marginal gains for students of all abilities. W hen teachers
        are provided with special enhance m ents (suggestions on ho w to tailor instruction based on data),
        significant gains in mathe matics are observed (National M athe matics Advisory Panel, 2008).




10
Recommendation 7:
Provide peer-assisted instruction to students.
Students with LD som etim es receive som e type of pe er assistance or one-on-one tutoring in
areas in w hich they ne ed help. The more traditional type of pe er-assisted instruction is cross-age,
w here a student in a higher grade functions primarily as the tutor for a student in a lo w er grade.
In the ne w er within-classroom approach, t w o students in the sam e grade tutor each other. In
many cases, a higher performing student is strategically placed with a lo w er performing student
but typically both students w ork in both roles: tutor (provides the tutoring) and tute e (receives
the tutoring).
    Cross-age pe er tutoring appears to be more beneficial than within-class pe er-assisted learning
for students with LD. It could be hypothesized that students with LD are too far belo w grade level
to benefit from fe edback from a pe er at the sam e grade level. It se e ms likely that within-class
pe er tutoring efforts may fall short of the level of explicitness necessary to effectively help
students with LD progress, w hereas older students (in cross-age pe er tutoring settings)
could be taught ho w to explain concepts to a student with LD w ho is several years younger.
Interestingly, within-class pe er-assisted instruction does appear to help lo w-achieving students
w ho have learning difficulties in mathe matics (Baker, G ersten, & Le e, 2002). O ne possible
explanation se e ms to be that there is too much of a gap in the content kno wledge bet w e en
students with learning disabilities compared to lo w-achieving students with learning difficulties,
thus enabling pe er tutoring to be more beneficial to students at risk than to students with LD.



   Summary of Evidence to Support Recommendation 7
   Meta-analysis of Mathematics Intervention Research for Students with LD
   C OI examined 2 studies in the area of cross age pe er tutoring (both RCTs).
   The m ean effect size of 1.02 w as statistically significant (p < .001; 95 % CI = 0.57 to 1.47).




                                                                                                         11
LIST OF RECOMMENDATIONS


1: Teach students using explicit instruction on a regular basis.

2: Teach students using multiple instructional examples.

3: Have students verbalize decisions and solutions to a
   math problem.

4: Teach students to visually represent the information in
   the math problem.

5: Teach students to solve problems using multiple/
   heuristic strategies.

6: Provide ongoing formative assessment data and feedback
   to teachers.

7: Provide peer-assisted instruction to students.




                                                                   13
REFERENCES


     Allinder, R. M ., Bolling, R., O ats, R., & Gagnon, W. A. (2000). Effects of teacher
          self-monitoring on imple m entation of curriculum-based m easure m ent and
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          and Special Education, 21(4), 219-226.
     Baker, D. E. (1992). The effect of self-generated dra wings on the ability of students
        with learning disabilities to solve mathe matical w ord proble ms. Unpublished
        doctoral dissertation, Texas Tech University.

     Baker, S., G ersten, R., & Le e, D. (2002). A synthesis of e mpirical research on
        teaching mathe matics to lo w-achieving students. Ele m entary School Journal,
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     Bottge, B. A., H einrichs, M ., M ehta Z. D., & Hung, Y. (2002). W eighing the benefits
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        classes. The Journal of Special Education, 35, 186–200.

     Bottge, B. A., Rueda, E., LaRoque P. T., Serlin, R. C., & K w on, J. (2007). Integrating
        reform-oriented math instruction in special education settings. Learning
         Disabilities Research and Practice, 22(2), 96–109.
     Bryant, B. R., & Bryant, D. P. (2008). Introduction to special series: M athe matics
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     Butler, F. M ., Miller, S. P., Crehan, K., Babbitt, B., & Pierce, T. (2003). Fraction
         instruction for students with mathe matics disabilities: Comparing t w o teaching
         sequences. Learning Disabilities Research and Practice, 18, 99–111.

     Fuchs, L. S., Fuchs, D., Hamlett, C. L., Phillips, N. B., & B entz, J. (1994). Class wide
        curriculum-based m easure m ent: H elping general educators m e et the challenge
        of student diversity. Exceptional Children, 60, 518–537.

     G ersten, R., Chard. D. J., Jayanthi, M ., Baker, S. K., M orphy, P., & Flojo, J.(in press).
         Teaching mathe matics to students with learning disabilities: A m eta-analysis of
         the intervention research. Portsmouth, N H: R M C Research Corporation, C enter
         on Instruction.




14
G ersten, R., Clarke, B., & M azzocco, M . (2007). Chapter 1: Historical and
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M analo, E., Bunnell, J., & Stillman, J. (2000). The use of process mne monics in
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O w en, R. L., & Fuchs, L. S. (2002). M athe matical proble m-solving strategy
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     solve equations. Journal of Educational Psychology, 99(3), 561–574.

Silbert, J., Carnine, D., & Stein, M . (1989). Direct instruction mathe matics.
    Columbus, O H: M errill.

Silver, E. A., Ghousseini, H., Gosen, D., Charalambous, C., & Stra w hun, B. (2005).
    M oving from rhetoric to praxis: Issues faced by teachers in having students
    consider multiple solutions for proble ms in the mathe matics classroom. Journal
    of M athe matical B ehavior, 24, 287–301.




                                                                                           15
Star, J. R. & Rittle-Johnson, B. (in press). Flexibility in proble m solving: The case of
         equation solving. Learning and Instruction.

     Tournaki, N. (2003). The differential effects of teaching addition through strategy
        instruction versus drill and practice to students with and without disabilities.
        Journal of Learning Disabilities, 36 (5), 449–458.
     Van Luit, J. E. H., & Naglieri, J. A. (1999). Effectiveness of the M ASTER program
        for teaching special children multiplication and division. Journal of Learning
         Disabilities, 32, 98–107.
     Witzel, B. S., M ercer, C. D., & Miller, M . D. (2003). Teaching algebra to students
        with learning difficulties: An investigation of an explicit instruction model.
        Learning Disabilities Research and Practice, 18, 121–131.
     Wood w ard, J. (2006). D eveloping Automaticity in multiplication facts: Integrating
       strategy instruction with tim ed practice drills. Learning Disability Q uarterly, 29,
       269–289.

     Wood w ard, J., M onroe, K., & Baxter, J. (2001). Enhancing student achieve m ent on
       performance assessm ents in mathe matics. Learning Disabilities Q uarterly, 24,
       33–46.

     Xin, Y. P., Jitendra, A. K., & D eatline-Buchman, A. (2005). Effects of mathe matical
         w ord proble m-solving instruction on middle school students with learning
         proble ms. The Journal of Special Education, 39 (4), 181–192.




16
Teaching Math To Sld Ld Guide
Teaching Math To Sld Ld Guide

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Teaching Math To Sld Ld Guide

  • 1. MATHEMATICS INSTRUCTION FOR STUDENTS WITH LEARNING DISABILITIES OR DIFFICULTY LEARNING MATHEMATICS A Guide for Teachers
  • 2.
  • 3. MATHEMATICS INSTRUCTION FOR STUDENTS WITH LEARNING DISABILITIES OR DIFFICULTY LEARNING MATHEMATICS A Guide for Teachers Madhavi Jayanthi Russell Gersten Scott Baker Instructional Research Group 2008
  • 4. The authors would like to express their appreciation to Becky Newman-Goncher and Kelly Haymond for their contributions to this publication. This publication was created for the Center on Instruction by Instructional Research Group. The Center on Instruction is operated by RMC Research Corporation in partnership with the Florida Center for Reading Research at Florida State University; Instructional Research Group; the Texas Institute for Measurement, Evaluation, and Statistics at the University of Houston; and the Meadows Center for Preventing Educational Risk at the University of Texas at Austin. The contents of this document were developed under cooperative agreement S283B050034 with the U.S. Department of Education. However, these contents do not necessarily represent the policy of the Department of Education, and you should not assume endorsement by the Federal Government. Editorial, design, and production services provides by RMC Research Corporation. Preferred citation: Jayanthi, M., Gersten, R., Baker, S. (2008). Mathematics instruction for students with learning disabilities or difficulty learning mathematics: A guide for teachers. Portsmouth, NH: RMC Research Corporation, Center on Instruction. To download a copy of this document, visit www.centeroninstruction.org.
  • 5. CONTENTS 1 INTRODUCTION 5 RECOMMENDATIONS 13 LIST OF RECOMMENDATIONS 14 REFERENCES v
  • 6.
  • 7. INTRODUCTION Historically, mathe matics instruction for students with learning disabilities and at-risk learners has not received the sam e level of consideration and scrutiny from the research com munity, policy makers, and school administrators as the field of reading. A recent revie w of the ERIC literature base (G ersten, Clarke, & M azzocco, 2007) found that the ratio of studies on reading disabilities to mathe matics disabilities and difficulties w as 5:1 for the years 1996–2005. This w as a dramatic improve m ent over the ratio of 16:1 in the prior decade. Even though this is far from a large body of research, sufficient studies exist to dictate a course of action. Recently, the C enter on Instruction conducted a m eta-analysis on the topic of teaching mathe matics to students with learning disabilities (G ersten, Chard, Jayanthi, Baker, M orphy, & Flojo, 2008). A m eta-analysis is a statistical m ethod by w hich research studies on a particular m ethod of instruction are sum marized to determine the effectiveness of that instructional m ethod. A m eta-analysis helps combine findings from disparate studies to determine the effectiveness of a particular m ethod of instruction. In the m eta-analysis on teaching mathe matics to students with learning disabilities (LD), only studies with randomized control trials (RCTs) and high quality quasi-experim ental designs (Q E Ds) w ere included. In an RCT, the study participants (or other units such as classrooms or schools) are randomly assigned to the experim ental and control groups, w hereas in a Q E D, there is no random assignm ent of participants to the groups. Seven Effective Instructional Practices Based on the findings of the m eta-analysis report, seven effective instructional practices w ere identified for teaching mathe matics to K–12 students with learning disabilities. In describing these practices, w e have incorporated recom m endations from The Final Report of the National M athe matics Advisory Panel (National M athe matics Advisory Panel, 2008) as w ell. This report specified recom m endations for students with learning disabilities and for students w ho w ere experiencing difficulties in learning mathe matics but w ere not identified as having a math learning disability (i.e., at-risk). The seven 1
  • 8. effective instructional practices in this docum ent are supported by current research findings. O ther instructional practices may be effective, but there is, at present, not enough high quality research to recom m end their use at this tim e. Som e of the recom m endations listed later in this docum ent (e.g., teach explicitly and use visuals) are age-old teaching practices. W hile there is nothing ne w about these practices, research continues to validate the m as effective instructional practices for students with learning disabilities and at-risk students, and continued use is w arranted. O ther instructional m ethods recom m ended here, such as using multiple instructional examples and teaching multiple strategies, have also be en endorsed in studies that focused on reform-oriented mathe matics instruction in general education classes (e.g., Silver, Ghousseini, Gosen, Charalambous, & Stra w hun, 2005; Rittle-Johnson & Star, 2007). This alignm ent of teaching m ethods bet w e en special education and general education enables students with learning disabilities to learn m eaningfully from general education curricula in inclusive classrooms. Mathematical Knowledge Current mathe matics researchers e mphasize thre e areas of mathe matical abilities (e.g., Kilpatrick, S w afford, & Findell, 2001; Rittle-Johnson & Star, 2007; Bottge, Rueda, LaRoque, Serlin, & K w on, 2007). They are: • procedural kno wledge, • procedural flexibility, and • conceptual kno wledge. Procedural kno wledge refers to kno wledge of basic skills or the sequence of steps ne eded to solve a math proble m. Procedural kno wledge enables a student to execute the necessary action sequences to solve proble ms (Rittle- Johnson & Star, 2007). Procedural flexibility refers to kno wing the many different w ays in w hich a particular proble m can be solved. Students with a good sense of procedural flexibility kno w that a given proble m can be solved in more than one w ay, and can solve an unkno w n proble m by figuring out a possible solution for that proble m. 2
  • 9. Conceptual kno wledge is a grasp of the mathe matical concepts and ideas that are not proble m-specific and therefore can be applied to any proble m- solving situation. Conceptual understanding is the over-arching understanding of mathe matical concepts and ideas that one often refers to as a “ good mathe matical sense. ” It is reasonable to extrapolate from this small but important body of research that such an e mphasis w ould also benefit students with disabilities and at-risk students. Recent studies have atte mpted to address reform-oriented math instruction in special education settings. Researchers such as Wood w ard (e.g., Wood w ard, M onroe, & Baxter, 2001) and Van Luit (Van Luit & Naglieri, 1999) have endeavored to address the issue of procedural flexibility in their research by focusing on multiple strategy instruction—a recom m endation in this docum ent, as m entioned earlier. Bottge (e.g., Bottge, H einrichs, M ehta, & Hung, 2002) has addressed the issue of procedural kno wledge and conceptual understanding by m eans of engaging, real-life, m eaningful proble m-solving contexts; ho w ever the limited number of studies precludes any recom m endations at this tim e. Effective Instruction at Each Tier The current focus on Response to Intervention (RTI) as a tiered prevention and intervention model for struggling mathe matics learners also calls for evidence- based instructional m ethods (Bryant & Bryant, 2008). W hile RTI models can have thre e or more tiers (the most com mon being thre e tiers), they all share the sam e objectives. For example, Tier 1 instruction, with an e mphasis on primary prevention, requires teachers to provide evidence-based instruction to all students. Tier 2 focuses on supple m ental instruction that provides differentiated instruction to m e et the learning ne eds of students. Tier 3 e mphasizes individualized intensive instruction. The ultimate goal of the RTI model is to reduce the number of students in successive tiers and the number of students receiving intensive instruction. The ground w ork for the success of this model is the effectiveness of the instruction provided in Tier 1.The evidence-based instructional strategies identified in this docum ent ne ed to be part of the teaching repertoire of Tier 1 teachers. These validated techniques, w hen imple m ented soundly, can effectively bring about student gains in mathe matics. 3
  • 10. O ur docum ent guides K–12 teachers of students with disabilities and at-risk students in their selection and use of effective mathe matics instructional m ethods. For each of the seven recom m endations, w e explain w hat w orks, describe ho w the practice should be done, and sum marize the evidence supporting the recom m endation. 4
  • 11. RECOMMENDATIONS Recommendation 1: Teach students using explicit instruction on a regular basis. Explicit instruction, a mainstay feature in many special education programs, includes teaching components such as: • clear modeling of the solution specific to the proble m, • thinking the specific steps aloud during modeling, • presenting multiple examples of the proble m and applying the solution to the proble ms, and • providing im m ediate corrective fe edback to the students on their accuracy. W hen teaching a ne w procedure or concept, teachers should begin by modeling and/or thinking aloud and w orking through several examples. The teacher e mphasizes student proble m solving using the modeled m ethod, or by using a model that is consonant with solid mathe matical reasoning. W hile modeling the steps in the proble m (on a board or overhead), the teacher should verbalize the procedures, note the symbols used and w hat they m ean, and explain any decision making and thinking processes (for example, “ That is a plus sign. That m eans I should…”). Teachers should model several proble ms with different characteristics (Rittle-Johnson & Star, 2007; Silbert, Carnine, & Stein, 1989). A critical technique is assisted learning w here students w ork in pairs or small groups and receive guidance from the teacher. During initial learning and practice, the teacher provides im m ediate fe edback to prevent mistakes in learning and allo w s students to ask questions for clarification. According to The Final Report of the National M athe matics Advisory Panel (National M athe matics Advisory Panel, 2008), explicit syste matic instruction improves the performance of students with learning disabilities and students with learning difficulties in computation, w ord proble ms, and transferring kno w n skills to novel situations. Ho w ever, the panel noted that w hile explicit instruction has consistently sho w n better results, no evidence supports its exclusive use for teaching students with learning disabilities and difficulties. The panel recom m ends that all teachers of students with learning disabilities and difficulties teach explicitly and syste matically on a regular basis to som e extent and not necessarily all the tim e. Summary of Evidence to Support Recommendation 1 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 11 studies in the area of explicit instruction (10 RCTs and 1 Q E D). The m ean effect size of 1.22 w as statistically significant (p < .001; 95 % CI = 0.78 to 1.67). National Mathematics Advisory Panel The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches for students with learning disabilities and lo w-achieving students. Explicit Syste matic Instruction is identified in The Final Report of the National M athe matics Advisory Panel as one of the defining features of effective instruction for students with learning disabilities (National M athe matics Advisory Panel, 2008). RCT = Randomized control trial. QED = Quasi-experimental design. CI= Confidence interval. 5
  • 12. Recommendation 2: Teach students using multiple instructional examples. Example selection in teaching ne w math skills and concepts is a se minal idea that is strongly e mphasized in the effective instruction literature (e.g., M a, 1999; Rittle-Johnson & Star, 2007; Silbert, Carnine, & Stein, 1989). Teachers ne ed to spend som e tim e planning their mathe matics instruction, particularly focusing on selecting and sequencing their instructional examples. The goal is to select a range of multiple examples of a proble m type. The underlying intent is to expose students to many of the possible variations and at the sam e tim e highlight the com mon but critical features of se e mingly disparate proble ms. For example, w hile teaching students to divide a given unit into half, a variety of proble ms can be presented that differ in the w ay the critical task of half is addressed in the proble ms (i.e., use the symbol for half; use the w ord half, use the w ord one-half; etc.) (O w en & Fuchs, 2002). M ultiple examples can be presented in a specified sequence or pattern such as concrete to abstract, easy to hard, and simple to complex. For example, fractions and algebraic equations can be taught first with concrete examples, then with pictorial representations, and finally in an abstract manner (Butler, Miller, Crehan, Babbitt, & Pierce, 2003; Witzel, M ercer, Miller, 2003). M ultiple examples can also be presented by syste matically varying the range presented (e.g., initially teaching only proper fractions vs. initially teaching both proper and improper fractions). Sequencing of examples may be most important during early acquisition of ne w skills w hen scaffolding is ne eded for student mastery and success. The range of examples taught is probably most critical to support transfer of learned skills to ne w situations and proble ms. In other w ords, if the teacher teaches a wide range of examples, it will result in the learner being able to apply a skill to a wider range of proble m types. Both of these planning devices (sequence and range) should be considered carefully w hen teaching students with LD. Summary of Evidence to Support Recommendation 2 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 9 studies on range and sequence of examples (all RCTs). The m ean effect size of 0.82 w as statistically significant (p < .001; 95 % CI = 0.42 to 1.21). National Mathematics Advisory Panel The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches for students with learning disabilities and lo w-achieving students. The panel recom m ends that teachers, as part of explicit instruction, carefully sequence proble ms to highlight the critical features of the proble m type (National M athe matics Advisory Panel, 2008). 6
  • 13. Recommendation 3: Have students verbalize decisions and solutions to a math problem. Encouraging students to verbalize, or think-aloud, their decisions and solutions to a math proble m is an essential aspect of scaffolded instruction (Palincsar, 1986). Student verbalizations can be proble m-specific or generic. Students can verbalize the specific steps that lead to the solution of the proble m (e.g., I ne ed to divide by t w o to get half) or they can verbalize generic heuristic steps that are com mon to proble ms (e.g., No w I ne ed to check my ans w er). Students can verbalize the steps in a solution format (First add the numbers in the units column. Write do w n the ans w er. Then add numbers in the tens column…) (Tournaki, 2003) or in a self-questioning/ans w er format (W hat should I do first? I should…) (Pavchinski, 1998). Students can verbalize during initial learning or as they are solving, or have solved, the proble m. M any students with learning disabilities are impulsive behaviorally and w hen faced with multi- step proble ms frequently atte mpt to solve the proble ms by randomly combining numbers rather than imple m enting a solution strategy step-by-step. Verbalization may help to anchor skills and strategies both behaviorally and mathe matically. Verbalizing steps in proble m solving may address students’ impulsivity directly, thus suggesting that verbalization may facilitate students’ self- regulation during proble m solving. Summary of Evidence to Support Recommendation 3 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 8 studies in the area of student verbalizations (7 RCTs and 1 Q E D). The m ean effect size of 1.04 w as statistically significant (p < .001; 95 % CI = 0.42 to 1.66). National Mathematics Advisory Panel The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches for students with learning disabilities and lo w-achieving students. The panel recom m ends that teachers, as part of explicit instruction, allo w students to think aloud about the decisions they make w hile solving proble ms (National M athe matics Advisory Panel, 2008). 7
  • 14. Recommendation 4: Teach students to visually represent the information in the math problem. Visual representations (dra wings, graphic representations) have be en used intuitively by teachers to explain and clarify proble ms and by students to understand and simplify proble ms. W hen used syste matically, visuals have positive benefits on students’ mathe matic performance. Visual representations result in better gains under certain conditions. Visuals are more effective w hen combined with explicit instruction. For example, teachers can explicitly teach students to use a strategy based on visuals (O w en & Fuchs, 2002). Also, students benefit more w hen they use a visual representation prescribed by the teacher rather than one that they self- select (D. Baker, 1992). Furthermore, visuals that are designed specifically to address a particular proble m type are more effective than those that are not proble m specific (Xin, Jitendra, & D eatline-Buchman, 2005). For example, in the study by Xin and her colleagues, students first identified w hat type of proble m they had be en given (e.g., proportion, multiplicative) and then used a corresponding diagram (taught to the m) to represent essential information and the mathe matical procedure necessary to find the unkno w n. Then they translated the diagram into a math sentence and solved it. Finally, visual representations are more beneficial if not only the teacher, but both the teacher and the students use the visuals (M analo, Bunnell, & Stillman, 2000). Summary of Evidence to Support Recommendation 4 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 12 studies on visual representations (11 RCTs and 1 Q E D). The m ean effect size of 0.47 w as statistically significant (p < .001; 95 % CI = 0.25 to 0.70). National Mathematics Advisory Panel The panel revie w ed 26 high quality studies (mostly RCTs) on effective instructional approaches for students with learning disabilities and lo w-achieving students. According to The Final Report of the National M athe matics Advisory Panel visual representations w hen combined with explicit instruction tended to produce significant positive results (National M athe matics Advisory Panel, 2008). 8
  • 15. Recommendation 5: Teach students to solve problems using multiple/heuristic strategies. Instruction in multiple/heuristic strategies is part of a conte mporary trend in mathe matics education (e.g., Star & Rittle-Johnson, in press). Using heuristics sho w s som e promise with students with learning disabilities. M ultiple/heuristic strategy instruction has be en used in addressing computational skills, proble m solving, and fractions. A heuristic is a m ethod or strategy that exe mplifies a generic approach for solving a proble m. For example, a heuristic strategy can include steps such as “ Read the proble m. Highlight the key w ords. Solve the proble ms. Check your w ork. ” Instruction in heuristics, unlike direct instruction, is not proble m-specific. H euristics can be used in organizing information and solving a range of math proble ms. They usually include student discourse and reflection on evaluating the alternate solutions and finally selecting a solution for solving the proble m. For example, in the Van Luit and Naglieri (1991) study, the teacher first modeled several strategies for solving a computational proble m. Ho w ever, for most of the lesson, the teacher’s task w as to lead the discussion in the direction of using strategies and to facilitate the discussion of the solutions provided by the students. Each student w as fre e to select a strategy for use, but the teacher assisted the children in discussion and reflection about the choices made. Similarly, in the Wood w ard (2006) study, students w ere taught multiple fact strategies. Daily lessons consisted of introduction of ne w strategies or revie w of old strategies. Students w ere not required to m e morize the strategies. They w ere, ho w ever, encouraged to discuss the strategy and contrast it with previously taught strategies. For example, students w ere sho w n that since 9 X 5 has the sam e value as 5 X 9, they w ere fre e to treat the proble m as either nine fives or five nines. They also w ere sho w n that this w as equivalent to 10 fives minus one five, and that this could be a faster w ay to do this proble m m entally. Thus a variety of options w ere discussed with the students. Summary of Evidence to Support Recommendation 5 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 4 studies in the area of multiple/heuristic strategy instruction (3 RCTs and 1 Q E D). The m ean effect size of 1.56 w as statistically significant (p < .001; 95 % CI = 0.65 to 2.47). 9
  • 16. Recommendation 6: Provide ongoing formative assessment data and feedback to teachers. O ngoing formative assessm ent and evaluation of students’ progress in mathe matics can help teachers m easure the pulse and rhythm of their students’ gro w th and also help the m fine-tune their instruction to m e et students’ ne eds. Teachers can administer assessm ents to their group of students and then a computer can provide the m with data depicting students’ current mathe matics abilities. Providing teachers with information regarding their students’ progress in mathe matics has beneficial effects on the mathe matics performance of those sam e students. Ho w ever, greater benefits on student performance will be observed if teachers are provided with not only performance fe edback information but also instructional tips and suggestions that can help teachers decide w hat to teach, w hen to introduce the next skill, and ho w to group/pair students. For example, teachers can be given a set of written questions to help the m use the formative assessm ent data for adapting and individualizing instruction. These written questions could include “ O n w hat skill(s) has the student improved compared to the previous t w o-w e ek period?” or “ Ho w will I atte mpt to improve student performance on the targeted skill(s)?” Teachers can respond to these questions and address the m again w hen ne w assessm ent data becom es available (Allinder, Bolling, O ats, & Gagnon, 2000). Teachers can also be provided with a specific set of recom m endations to address instructional planning issues such as w hich mathe matical skills require additional instructional tim e for the entire class, w hich students require additional help via som e sort of small group instruction or tutoring, and w hich topics should be included in small group instruction (Fuchs, Fuchs, Hamlett, Phillips, & B entz, 1994). Summary of Evidence to Support Recommendation 6 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 10 studies on formative assessm ent (all RCTs). The m ean effect size of 0.23 w as statistically significant (p < .01; 95 % CI = 0.05 to 0.41). National Mathematics Advisory Panel The panel revie w ed high quality studies on formative assessm ent and noted that formative assessm ent use by teachers results in marginal gains for students of all abilities. W hen teachers are provided with special enhance m ents (suggestions on ho w to tailor instruction based on data), significant gains in mathe matics are observed (National M athe matics Advisory Panel, 2008). 10
  • 17. Recommendation 7: Provide peer-assisted instruction to students. Students with LD som etim es receive som e type of pe er assistance or one-on-one tutoring in areas in w hich they ne ed help. The more traditional type of pe er-assisted instruction is cross-age, w here a student in a higher grade functions primarily as the tutor for a student in a lo w er grade. In the ne w er within-classroom approach, t w o students in the sam e grade tutor each other. In many cases, a higher performing student is strategically placed with a lo w er performing student but typically both students w ork in both roles: tutor (provides the tutoring) and tute e (receives the tutoring). Cross-age pe er tutoring appears to be more beneficial than within-class pe er-assisted learning for students with LD. It could be hypothesized that students with LD are too far belo w grade level to benefit from fe edback from a pe er at the sam e grade level. It se e ms likely that within-class pe er tutoring efforts may fall short of the level of explicitness necessary to effectively help students with LD progress, w hereas older students (in cross-age pe er tutoring settings) could be taught ho w to explain concepts to a student with LD w ho is several years younger. Interestingly, within-class pe er-assisted instruction does appear to help lo w-achieving students w ho have learning difficulties in mathe matics (Baker, G ersten, & Le e, 2002). O ne possible explanation se e ms to be that there is too much of a gap in the content kno wledge bet w e en students with learning disabilities compared to lo w-achieving students with learning difficulties, thus enabling pe er tutoring to be more beneficial to students at risk than to students with LD. Summary of Evidence to Support Recommendation 7 Meta-analysis of Mathematics Intervention Research for Students with LD C OI examined 2 studies in the area of cross age pe er tutoring (both RCTs). The m ean effect size of 1.02 w as statistically significant (p < .001; 95 % CI = 0.57 to 1.47). 11
  • 18.
  • 19. LIST OF RECOMMENDATIONS 1: Teach students using explicit instruction on a regular basis. 2: Teach students using multiple instructional examples. 3: Have students verbalize decisions and solutions to a math problem. 4: Teach students to visually represent the information in the math problem. 5: Teach students to solve problems using multiple/ heuristic strategies. 6: Provide ongoing formative assessment data and feedback to teachers. 7: Provide peer-assisted instruction to students. 13
  • 20. REFERENCES Allinder, R. M ., Bolling, R., O ats, R., & Gagnon, W. A. (2000). Effects of teacher self-monitoring on imple m entation of curriculum-based m easure m ent and mathe matics computation achieve m ent of students with disabilities. Re m edial and Special Education, 21(4), 219-226. Baker, D. E. (1992). The effect of self-generated dra wings on the ability of students with learning disabilities to solve mathe matical w ord proble ms. Unpublished doctoral dissertation, Texas Tech University. Baker, S., G ersten, R., & Le e, D. (2002). A synthesis of e mpirical research on teaching mathe matics to lo w-achieving students. Ele m entary School Journal, 103, 51–73. Bottge, B. A., H einrichs, M ., M ehta Z. D., & Hung, Y. (2002). W eighing the benefits of anchored math instruction for students with disabilities in general education classes. The Journal of Special Education, 35, 186–200. Bottge, B. A., Rueda, E., LaRoque P. T., Serlin, R. C., & K w on, J. (2007). Integrating reform-oriented math instruction in special education settings. Learning Disabilities Research and Practice, 22(2), 96–109. Bryant, B. R., & Bryant, D. P. (2008). Introduction to special series: M athe matics and learning disabilities. Learning Disability Q uarterly, 31(1), 3–10. Butler, F. M ., Miller, S. P., Crehan, K., Babbitt, B., & Pierce, T. (2003). Fraction instruction for students with mathe matics disabilities: Comparing t w o teaching sequences. Learning Disabilities Research and Practice, 18, 99–111. Fuchs, L. S., Fuchs, D., Hamlett, C. L., Phillips, N. B., & B entz, J. (1994). Class wide curriculum-based m easure m ent: H elping general educators m e et the challenge of student diversity. Exceptional Children, 60, 518–537. G ersten, R., Chard. D. J., Jayanthi, M ., Baker, S. K., M orphy, P., & Flojo, J.(in press). Teaching mathe matics to students with learning disabilities: A m eta-analysis of the intervention research. Portsmouth, N H: R M C Research Corporation, C enter on Instruction. 14
  • 21. G ersten, R., Clarke, B., & M azzocco, M . (2007). Chapter 1: Historical and conte mporary perspectives on mathe matical learning disabilities. In D.B. B erch & M . M . M . M azzocco (Eds.). W hy is math so hard for som e children? The nature and origins of mathe matical learning difficulties and disabilities (pp. 7–29). Baltimore, M D: Paul H. Brooks Publishing Company. Kilpatrick, J., S w afford, J. O ., & Findell, B. (Eds.). (2001). Adding it up: H elping children learn mathe matics. Washington, D C: National Acade my Press. M a, L. (1999). Kno wing and teaching ele m entary mathe matics. M ah w ah: La wrence Erlbaum Associates, Inc. M analo, E., Bunnell, J., & Stillman, J. (2000). The use of process mne monics in teaching students with mathe matics learning disabilities. Learning Disability Q uarterly, 23, 137–156. National M athe matics Advisory Panel. (2008). Foundations for Success: The Final Report of the National M athe matics Advisory Panel. Washington, D C: U.S. D epartm ent of Education. O w en, R. L., & Fuchs, L. S. (2002). M athe matical proble m-solving strategy instruction for third-grade students with learning disabilities. Re m edial and Special Education, 23, 268–278. Palincsar, A. S. (1986). The role of dialogue in providing scaffolded instruction. Educational Psychologist, 21, 73–98. Pavchinski, P. (1988). The effects of operant procedures and cognitive behavior modification on learning disabled students’ math skills. Unpublished doctoral dissertation, University of Florida. Rittle-Johnson, B., & Star, J. R. (2007). Does comparing solution m ethods facilitate conceptual and procedural kno wledge? An experim ental study on learning to solve equations. Journal of Educational Psychology, 99(3), 561–574. Silbert, J., Carnine, D., & Stein, M . (1989). Direct instruction mathe matics. Columbus, O H: M errill. Silver, E. A., Ghousseini, H., Gosen, D., Charalambous, C., & Stra w hun, B. (2005). M oving from rhetoric to praxis: Issues faced by teachers in having students consider multiple solutions for proble ms in the mathe matics classroom. Journal of M athe matical B ehavior, 24, 287–301. 15
  • 22. Star, J. R. & Rittle-Johnson, B. (in press). Flexibility in proble m solving: The case of equation solving. Learning and Instruction. Tournaki, N. (2003). The differential effects of teaching addition through strategy instruction versus drill and practice to students with and without disabilities. Journal of Learning Disabilities, 36 (5), 449–458. Van Luit, J. E. H., & Naglieri, J. A. (1999). Effectiveness of the M ASTER program for teaching special children multiplication and division. Journal of Learning Disabilities, 32, 98–107. Witzel, B. S., M ercer, C. D., & Miller, M . D. (2003). Teaching algebra to students with learning difficulties: An investigation of an explicit instruction model. Learning Disabilities Research and Practice, 18, 121–131. Wood w ard, J. (2006). D eveloping Automaticity in multiplication facts: Integrating strategy instruction with tim ed practice drills. Learning Disability Q uarterly, 29, 269–289. Wood w ard, J., M onroe, K., & Baxter, J. (2001). Enhancing student achieve m ent on performance assessm ents in mathe matics. Learning Disabilities Q uarterly, 24, 33–46. Xin, Y. P., Jitendra, A. K., & D eatline-Buchman, A. (2005). Effects of mathe matical w ord proble m-solving instruction on middle school students with learning proble ms. The Journal of Special Education, 39 (4), 181–192. 16