“With the collaboration of a number of dedicated teachers and their students, Susan Empson and Linda Levi have produced a volume that is faithful to the basic principles of CGI while at the same time covering new ground with insight and innovation.”

—Thomas P. Carpenter

This highly anticipated follow-up volume to the landmark Children’s Mathematics:... more

The bestselling first edition of Children’s Mathematics  helped hundreds of thousands of teachers understand children’s intuitive mathematical thinking and use that knowledge to help children learn mathematics with understanding.  The highly anticipated Second Edition provides new insights about Cognitively Guided Instruction based on the authors’ research and experience... more

"Young children are naturally curious and observant, and enter school ready to connect their rich informal understandings about the world around them to their experiences in classrooms.”
—Thomas Carpenter, Megan Franke, Nicholas Johnson, Angela Chan Turrou, and Anita Wager

Cognitively Guided Instruction... more

Number Talks

1. A five- to fifteen-minute classroom conversation around purposefully crafted problems that are solved mentally.
2. The best part of a teacher’s day.

Number Talks: Fractions, Decimals, and Percentages is a dynamic multimedia resource created in response to the requests of teachers—those... more

“Nancy’s in-depth look at mathematical modeling offers middle school teachers the kind of practical help they need for incorporating modeling into their classrooms.”
—Cathy Seeley, Past President of NCTM, author of Faster Isn’t Smarter and Smarter Than We Think