2. Context of this study
A 5-year NSF funded professional development
project, which uses PBL approach to developing
K-12 science teachers.
Why using PBL as a teacher professional
development model?
Teaching problem is messy, ill-structured
We view teachers as professional clinicians
Problem solving skills are important for teachers
Collaborative learning community benefits teacher
learning
3. The PD model
Summer
Week 1: Immersion in content
Week 2: Focus on practice
Analyze teaching problems using PBL
Identify a problem from practice for teacher research
School year
Conduct research on the problems they selected in
summer
Meet in small groups monthly to share and discuss
their research
4. Vital role of facilitation in PBL
A problem, however well designed, does not teach itself.
A new group does not automatically form a learning
community.
“If teaching with PBL were as simple as presenting the
learners with a ‘problem’ and students could be relied
upon to work consistently at a high level of cognitive self-
monitoring and self-regulation, then many teachers
would be taking early retirement.” (Savery, 2006 p. 15)
5. Challenges in facilitation
Unpredictability of
group discussion
(e.g., Morine-Dershimer, 1996;
Saunders et. al., 1992)
Teaching
as telling
Passive
and totally
uninvolved
Conflicting goals of
facilitation (e.g., Hmelo-
Silver, 2004; Levin, 1999)
Making transition from
regular instructors to PBL
facilitators (e.g., Hak & Maguire, 2000;
Schmidt et al., 1993)
Community
building
Fostering
learning
Planned
agenda
Group
autonomy
6. Research in facilitation strategies
Lack of empirical studies on PBL facilitation
Studies by Hmelo-Silver & Barrows (2006; 2008)
Examined two 2.5-hour long PBL meetings with 5 medical
students
Identified 10 strategies used by an experienced facilitator
1) use of open-ended and metacognitive questioning,
2) pushing for explanation,
3) revoicing,
4) summarizing,
5) generate/evaluate hypothesis,
6) map between symptoms and hypotheses,
7) check consensus that whiteboard reflects discussion,
8) cleaning up the board,
9) creating learning issues,
10) encourage construction of visual representation (p.27-28)
7. Shedding light on “the Black Box”
Critique of existing studies
Limited sample size
Restriction in Medical school context
“It would be naïve to believe that the medical school model
of PBL could be imported into other settings without
considering how to adapt it to the local context, goals, and
developmental level of learners” (Hmelo-Silver, 2004 p. 260).
Need for new research in facilitation
The group and tutorial process remains to be a “black
box.” (Hak & Maguire, 2000 p.769)
8. Research Questions
How did facilitators and teachers use speaking
turns in the PBL discussion?
What strategies did experienced facilitators
employ in a PBL discussion in the context of PD
for science teachers?
What goals did the facilitators attempt to achieve
by using these strategies?
How did teachers evaluate the facilitation and
the discussion?
9. Methods
Participants:
6 facilitators worked in pairs: one main facilitator, one assistant facilitator
All three lead facilitators had 20+ or 30+ years of teaching experience as
either science educators or science teacher educators
Had extensive experience in leading small group discussion in their
classrooms
Received training on how to lead PBL discussion
Used design meetings to share experience in facilitation
35 teachers in four small groups
Problems
Three problems:
Circuits: how to move from vague ideas to scientific understanding of
circuits?
Falling object: how to help students notice and resolve discrepant data?
Weather map: how to structure the group task to stimulate more
collaboration among students?
10. Table 1: Facilitators, problems and teachers
Main
facilitator
Assistant
facilitator
Problem Day 1 Day 2
Jocelyn Ashley Falling
Objects
Elementary Group 1
(10 teachers)
Elementary Group
2 (9 teacher)
Stephanie Hannah Circuits Elementary Group 2
(9 teacher)
Elementary Group
1 (10 teacher)
Presley Karen Weather
Map
Secondary group 1
(8 teachers)
Secondary group 2
(8 teachers)
11. PBL process…
Group members encounter a new problem
(called dilemma)
Analyze and discuss views of the problem
Identify key facts as it relates to the problem
Propose hypotheses
Formulate learning issues
investigate learning issues
Discuss new knowledge
Summarize learning
12.
13.
14. Data sources
Video recordings of six PBL group
discussions, resulting in about 15 hours of
videos
Charts generated during the group
discussion
Evaluation questionnaire at the end of
Focus on Practice week
15. Data analysis
Analysis of speaking turns for both facilitators and
teachers
Development of coding scheme for analyzing facilitation
strategies and goals
Inter-rater reliability for coding: 91% agreement for 17% of data
Member checks with three lead facilitators about our
interpretation of their goals
Triangulation with the project design document about the
PD goals
Triangulation with teachers’ perspectives on effective
facilitation strategies
16. Results: Analysis of speaking turns
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
Circuits 1 Circuits 2 Weather
maps 1
Weather
maps 2
Falling Object
1
Falling Object
2
Main facilitator
Assistant facilitator
Teachers
Figure 1: Distribution of speaking turns among facilitators and teachers
17. Results: Analysis of facilitation goals
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
I. Promoting an active
PBL discourse
II. Establishing learning
community
III. Maintaining group
process
IV. Modeling the study
group practice
Figure 3: Frequencies of facilitating goals
18. Results: Analysis of strategy use
Figure 2: Frequencies of major facilitating strategies
0.0%
5.0%
10.0%
15.0%
20.0%
25.0%
30.0%
Questioning
Revoicing
Clarifying
Elaborating
Reframing
Summarizing
Making
connection
Feedbackto
individual
Joking
Feedbackto
group
Alleviating
frustration
Metadiscourse
Task
explanation
Callingout
Assigning
Roleplaying
Explaining
process
Promoting PBL discourse Establishing learning
community
Maintaining group
process
Modeling
practice
22. Discussion
Speaking turns:
This study: 32% of speaking turns and 28%
of total words
Saunders (1992) reported in case-based
discussion, she talked 33% of the time as a
facilitator.
66% of time of teacher talk in typical
classroom discourse (Cazden, 1986).
23. Discussion
Facilitation goals and strategies:
Some strategies are similar to the findings of Hmelo-
Silver & Barrows (2006; 2008), such as questioning,
revoicing and summarizing
Identified new strategies, such as making
connections, alleviate frustration, role play
Modeling group process practice might be unique to
the PD context
Few PBL studies have reported frequency data on
facilitation strategies
24. Limitation and future research
Limitation of this study
Short period
Did not examine the effects of individual strategies
Difficulty with measuring discussion-based learning
Future research direction
How facilitation is interacted with other important PBL
variables, such as the problem, the group and the
learning context?
How facilitators develop skills in a relatively longer
period?
What is the effect of individual strategies?
Hinweis der Redaktion
Good morning! My name is Meilan Zhang. I am a postdoctoral researcher in a professional development project at Michigan State University. This PD used the PBL approach to developing science teachers’ content knowledge and pedagogical content knowledge. In this study, we focused on facilitation, how facilitators promoted problem-based discussion?
My colleague, Mary Lundeberg is there. She is also one of the Co-PIs of the project and a co-author of this paper. She might add some information about the project in the discussion session;
First, let me give you a little bit context about this PD project, it is a five-year NSF funded professional development program, which uses the PBL approach to develop K-12 science teachers’ content knowledge and pedagogical content knowledge.
Why using PBL for teacher professional development? First, teaching problem is very messy, ill-structured, similar to the problems used in medical school PBLmodel.
Also, we view teachers as professional clinicians who need identify, analyze problems of practice and reflect on solutions for the problems.
Finally, PBL emphasizes small group learning, and research has documented that collaborative learning community benefits teacher learning.
; teachers need to learn to identify and analyze problems, and reflect on possible solutions for the problem
==================================================================
Teachers as reflective practitioners who analyze and reflect on the problems in their teaching practice
PBL holds great promise for teacher learning
Group discussion of teaching practice promotes reflection
Little is known about how to facilitate such as productive group discussion
This PD model has two parts: a 2-week summer PD and a year-long action research project. In the summer, the first week focused on improving teachers’ content knowledge; teachers used PBL approach to solve content problems; In the second week, teachers used the PBL approach to analyzing teaching problems. They also identified a problem from their own practice that they want to work on in the school year.
During the school year, teachers conducted research on the problems they selected in summer; they videotaped their lesson, and they met in small groups once a month to discuss their research; they also used the PBL approach to discuss the process.
In this study, we focused on this part. We looked at how facilitators guided teachers to analyze problems of practice using the PBL approach.
========================================================
assessment, instructional decision making, student interaction
So, why focusing on facilitation? Because facilitation plays an essential role in PBL. A problem does not teach itself; also, a new group does not automatically form a learning community; As Savery, 2006 argued, if teaching with PBL could be done without a facilitator, then many teachers would be taking early retirement.
Research has documented the complexity of facilitation. First, group discussion is hard to predict; so, on one hand, facilitators need to have planned agenda, but on the other hand, they also need to be flexible to adapt to the group autonomy.
Second, facilitators often face conflicting goals, for example, if facilitators wants to emphasize community building, they may provide less guidance; if they want to emphasize learning and make sure students do not walk away with misconception, they may provide more guidance.
Third, many PBL instructors face challenges when they make transitions from regular instructor to PBL facilitators. Some teachers are used to the teaching as telling model, so they lecture a lot in the PBL discussion. While other instructors may have a rigid view of student-centered learning, so they are afraid of intervening in discussion, and stay passive or even totally uninvolved.
So far, few empirical studies have focused on facilitation process and strategies, except the studies by Hmelo-Silver & Barrows. Their studies looked at two PBL meetings with 5 medical students. They identified 10 strategies used by an experienced facilitator, such as asking open-ended and metacognitive questions, pusing for explanation, revoicing, and summarizing.
===========================================
Although practical wisdom is valuable in helping instructors develop their facilitation skills, very few empirical studies have examined the strategies used by facilitators in PBL, with the exception of Hmelo-Silver and Barrows (2006, 2008). Hmelo-Silver and Barrows (2006) identified ten strategies that an experienced facilitator used in two 2.5-hour long problem-based learning meetings with five medical students. These strategies included: “1) use of open-ended and metacognitive questioning, 2) pushing for explanation, 3) revoicing, 4) summarizing, 5) generate/evaluate hypothesis, 6) map between symptoms and hypotheses, 7) check consensus that whiteboard reflects discussion, 8) cleaning up the board, 9) creating learning issues, and 10) encourage construction of visual representation” (p. 27-28). These strategies were used to achieve both educational goals including helping students to develop clinical causal explanation, reason effectively, and recognize knowledge deficiencies, and performance goals of keeping all students involved in learning, keeping discussion on track, making explicit student thinking, and developing self-directed learning skills. In a more detailed analysis of the same PBL group process, Hmelo-Silver and Barrows (2008) examined episodes in which the facilitator supported collaborative knowledge construction by asking open-ended questions.
The studies by Hmelo-Silver and Barrows (2006, 2008) made important contributions to understanding facilitation through illustrating the complex strategies used by an expert facilitator to promote clinical reasoning skills in medical students. However, this study examined only one single facilitator and two PBL meetings. In addition, the context was in the medical school and some strategies are content specific, such as mapping between symptoms and hypotheses. How and whether these strategies apply to a professional development context to promote teachers’ learning remains unclear.
In sum, although existing studies provide valuable insight on the role of facilitation, many issues remain unknown regarding facilitation. In addition, the research on PBL facilitation has almost exclusively been conducted in medical schools. This is not surprising given the history of PBL in medical education. Research on PBL facilitation in other contexts is very rare. To date, we know little about the use of PBL in a professional development context. Therefore, evidence on how PBL can be implemented in a PD program for science teachers is greatly needed to help teacher educators make informed decisions in adapting PBL to their specific contexts, otherwise, as Hmelo-Silver (2004) asserted, “it would be naïve to believe that the medical school model of PBL could be imported into other settings without considering how to adapt it to the local context, goals, and developmental level of learners” (p. 260).
Given the complex process of PBL facilitation, many researchers have identified the need for investigation on what actually happens in the PBL process (Dolmans et al., 2002; Svinicki, 2007). Hak and Maguire (2000) caution that: “research [on PBL] to date has largely neglected the issue of the actual activities and learning processes that mediate and moderate the relationship between these programs and their cognitive outcomes” (769). The group and tutorial process remains to be a “black box.”
In this study, we attempt to shed some light on the “black box” by providing a window into the complexity of facilitation through researching four questions: 1) What strategies did experienced facilitators employ in a PBL discussion in the context of PD for science teachers? 2) What goals did the facilitators attempt to achieve by using these strategies? and 3) How did teachers evaluate the facilitation and the discussion?
Although their studies made important contribution to understanding facilitation, they focused on only one facilitator, and it was in medical school context. Clearly, more studies in other context are needed, as Hmelo-Silver herself argued, it would be naïve to believe the medical school PBL model could work in other context without any adaption.
Hak & Maguire in 2000 critiqued that in PBL studies, the group and tutorial process remains to be a black box, so in this study, we intended to shed some light on the black box by studying facilitation.
Specifically, we ask four research questions:
Materials included three teaching problems and relevant video clips from the Third International Math and Science Study (TIMSS) video series.
Elementary teachers analyzed the Falling Object and Circuits problem and secondary teachers studied the Weather Map problem.
In the Falling Object problem, the teacher taught first graders science process skills in a unit of gravity.
Students conducted experiments of dropping a book and a piece of paper in small groups.
The teacher’s problem was how to help students notice and resolve discrepant data.
In the Circuits problem, 4th grade students constructed an electric circuit to provide a pathway. The teacher was struggling to help her students move from vague ideas to a more scientific understanding of circuits and pathways. In the Weather Map problem, eighth grade students studied a unit of Meteorology.
However, the teacher observed that the students were interacting only occasionally by talking quietly or sharing maps. She wondered how she could structure the task differently to stimulate more collaboration among students.
This table shows that two facilitators worked in a pair to facilitate two groups of teachers for two days.
We won’t go to details, but I just want to give you a sense about the ideas generated from the discussion. This example is from Circuits 1 discussion. These were the facts they identified when they analyzed the circuits problem, these were the learning issues they developed, these were the hypothesis they developed. Teachers prioritized the learning issues and conducted research using books or online resources;
And these were the research findings for the learning issues; and finally, they made recommendations for solving the Circuits problem.
Using the survey data, we triangulated with teachers’ perspectives on effective facilitation strategies.
Create a graph to show the average percentage; connect to literature;
why it is important; different from 66%;
This is the coding scheme we used. I will explain about the strategies and goals
I would like to use the coding scheme to explain a little about the strategies. For the goal of promoting active PBL discourse, facilitators asked many questions. Some of the questions were generic, open-ended questions to get the discussion started, such as, any facts or learning issues that you have? Some questions were clarifying questions, such as, what do you mean by that? Could you explain more? Some were challenging questions, such as, how your idea is different from another person’s idea?
To our knowledge, very few studies have reported how much facilitators talk in a PBL session.
The frequency of facilitators’ talk provides a reference point for other facilitators who guide a new PBL group.
=================================================
Furthermore, in line with the learner-centered principle, we found that on average the main facilitators talked about 32% of speaking turns and 28% of total words, which is significantly lower than the 66% of time of teacher talk in typical classroom discourse (Cazden, 1986). The frequency of facilitators’ talk provides a reference point for other facilitators who guide a new PBL group.
Saunders (1992) reported in case-based discussion, in which she talked 33% of the time when she facilitated an undergraduate class.
To our knowledge, very few studies have reported how much facilitators talk in a PBL session.
The frequency of facilitators’ talk provides a reference point for other facilitators who guide a new PBL group.
=================================================
Furthermore, in line with the learner-centered principle, we found that on average the main facilitators talked about 32% of speaking turns and 28% of total words, which is significantly lower than the 66% of time of teacher talk in typical classroom discourse (Cazden, 1986). The frequency of facilitators’ talk provides a reference point for other facilitators who guide a new PBL group.
Saunders (1992) reported in case-based discussion, in which she talked 33% of the time when she facilitated an undergraduate class.