Abstract
Comparison is a powerful learning process. How can we can use comparison to support better learning of school mathematics within classroom settings? In 5 short-term experimental, classroom-based studies, we evaluated comparison of multiple strategies for supporting mathematics knowledge. We next developed supplemental Algebra I curriculum and professional development for teachers to integrate Comparison and Explanation of Multiple Strategies (CEMS) in their classrooms and tested the promise of the approach. Benefits and challenges emerged, leading to evidence-based guidelines for effectively supporting comparison and explanation in the classroom.