Debra Coggins is a mathematics education consultant with experience advising districts, coaching teachers, and developing and delivering professional development. As a writer, she has helped develop a number of professional development programs for teachers of mathematics. These include creating CORE Math: Building Strong Foundations, assisting with the development of the Math Case Methods Project and Math Pathways and Pitfalls at WestEd, and coordinating the writing of America s Choice Core Assignments. She was the lead writer of A Mathematics Source Book for Elementary and Middle School Teac...