The document proposes an integrated model called Integrated Multicultural Instructional Design (IMID) to maximize equity, access, and success for all learners in undergraduate mathematical thinking courses. The model integrates multicultural education, ethnomathematics, and universal instructional design. Increased mathematical literacy is necessary for all to achieve effective global citizenship and participation. Key terms like ethnomathematics and mathematics literacy are defined. A diagram is included to visualize the student-centered and teacher-centered aspects of the proposed inclusive theoretical model.