Karren Shultz-Ferrell is coauthor of Introduction to Reasoning and Proof (Grades PreK - 2, 3 - 5, and 6 - 8), part of Heinemann's Math Process Standards Series. She is an elementary mathematics instructional specialist for Montgomery County Public Schools in Maryland and former classroom teacher. A board representative for the Maryland Council of Teachers of Mathematics, Karren consults with school systems and presents at state, regional, and national conferences.
