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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. 

Russell, Susan Jo

Susan Jo Russell

Susan Jo Russell began her career in education as a K-3 classroom teacher and elementary mathematics coach. For the last four decades, she has been a senior researcher at TERC, a nonprofit organization that focuses on mathematics and science education, where she directed projects on children’s mathematical understanding and on supporting teachers to learn more about mathematics and about children's mathematical thinking. She spearheaded the original development and second edition of the K-5 mathematics curriculum, Investigations in Number, Data and Space, and contributed to the conceptualization of the Forum for Equity in Elementary Mathematics. In recent years, her research has centered on how students engage in early algebra, number and operations, and mathematical argument, and how to support teachers to engage all of their students in high-level mathematical reasoning.