Thomas, a math teacher and consultant who is associated with a professional development organization that works with math educators, and Brunsting, a math teacher, staff-development specialist, and author, delineate 21 research-based strategies to help middle school teachers differentiate math instruction and assessment according to student learning styles. They outline four categories to teach specific math skills and learning styles--computing accurately, explaining concepts, finding ways to solve routine problems, and exploring and discussing real-world applications with others--as well as multistyle strategies and instructional strategies to use to reach all learners, engage students, and change their perceptions about math, with a focus on rotating the skills in the classroom. They include links to standards, directions, examples, planning considerations, reproducible forms, and variations. Annotation ©2010 Book News, Inc., Portland, OR (booknews.com)