Key visualizations

A rich body of research indicates that authentic interactive visualizations of key concepts can promote engagement by students and lead to greater mastery of them as measured by performance on assessment tasks.

The animations sampled here were developed in collaboration with hundreds of exemplary mathematics educators throughout the country as part of a system of programs intended to enable every student to have the opportunity to succeed in learning a challenging mathematics curriculum, supported by a teacher who has access to the most promising practices in instruction and formative assessment. The larger programs, available to schools and districts by subscription, contain thousands of research-based animations of key concepts.

For more information on these resources, please contact Kathi Cook at or Susan May at