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In observance of the 2024 holiday season, Sage offices will be closed Monday December 23rd through Wednesday January 1st. Normal operations, including shipping for orders placed during the closure, will resume on Thursday January 2nd. For technical support during this time, please visit our technical support page for assistance options. 

We wish you a wonderful holiday season. Thank you. 

Thunder, Kateri

Kateri Thunder

Kateri Thunder, Ph.D., has the pleasure of collaborating with learners and educators from school divisions and early learning centers around the world to translate research into practice. She has served as an inclusive early childhood educator, an Upward Bound educator, a mathematics specialist, an assistant professor of mathematics education at James Madison University, and Site Director for the Central Virginia Writing Project. Her research, writing, and presentations focus on equity and access in early childhood and mathematics education, as well as the intersection of literacy and mathematics for teaching and learning. Kateri has collaborated with thousands of educators to catalyze change in their classrooms, centers, and schools. She is the chair of NCTM’s Research Committee and co-creator of The Math Diet. Additionally, she is a best-selling author for Corwin’s Teaching Mathematics in the Visible Learning Classroom Series, the Success Criteria Playbook, and Visible Learning in Early Childhood.