3rd Edition

Co-Directors
Karen Economopoulos
Keith Cochran

Senior Authors
Keith Cochran
Karen Economopoulos
Arusha Hollister
Megan Murray
Susan Jo Russell
Deborah Schifter (Education Development Center)

Contributing Authors
Virginia Bastable
Nancy Belkov
Katie Hickey
Katrina Mills
Annie Sussman
Denise Treacy
Lucy Wittenberg

Administrative Staff
Lorraine Brooks
Christopher Clancy
Katie Stokinger
Amy Taber

Collaborating Teachers
Lindsay Barton
Carolyn Callender
Katie Carr
Mary Elizabeth Cranton
Justin Cravens
Kathleen Earley
Cailin Eaton
Kerri Favreau
Jen Gehling
Steve Goldman
Diane Griggs
Gizelle Lev
Katrina Mills
Jolene O’Brien
Stacy Sweeney
Ashley Warlick
Jerilyn Willig
Lucy Wittenberg

Reviewers
George Avrunin
Professor
Department of Mathematics and Statistics
University of Massachusetts Amherst

Ben Ford, Professor
Department of Mathematics and Statistics
Sonoma State University

Scott J. Hendrickson
Associate Teaching Professor
Mathematics Education
Brigham Young University

DeAnn Huinker
Professor, Mathematics Education
Director, Center for Mathematics and Science
Education Research
University of Wisconsin-Milwaukee

Reva Kasman
Associate Professor
Mathematics
Salem State University

Elham Kazemi
Professor
Mathematics Education
University of Washington

Harriet Pollatsek
Professor Emerita
Mathematics
Mount Holyoke College

Edward Silver
Professor of Education & Mathematics
University of Michigan

Virginia C. Stimpson
Mathematics Educator
University of Washington

Lucy West
President and Founder
Metamorphosis Teaching Learning Communities

2nd Edition

Co-Principal Investigators
Susan Jo Russell
Karen Economopoulos

Authors
Lucy Wittenberg, Director Grades 3-5
Karen Economopoulos, Director Grades K-2
Virginia Bastable (Summermath for Teachers, Mt. Holyoke College)
Katie Hickey Bloomfield
Keith Cochran
Darrell Earnest
Arusha Hollister
Nancy Horowitz
Erin Leidl
Megan Murray
Young Oh
Beth W. Perry
Susan Jo Russell
Deborah Schifter (Education Development Center)
Kathy Sillman

Contributing Authors
Denise Baumann
Jennifer DiBrienza
Hollee Freeman
Paula Hooper
Jan Mokros
Stephen Monk (University of Washington)
Mary Beth O’Connor
Judy Storeygard
Cornelia Tierney
Elizabeth Van Cleef
Carol Wright

Administrative Staff
Amy Taber, Project Manager
Beth Bergeron
Lorraine Brooks
Emi Fujiwara

Other Staff
Amy Appell
Rachel E. Davis
Jim Hammerman
Traci Higgins
Julia Thompson

Collaborating Teachers
Bethany Altchek
Linda Amaral
Kimberly Beauregard
Barbara Bernard
Nancy Buell
Rose Christiansen
Chris Colbath-Hess
Lisette Colon
Kim Cook
Frances Cooper
Kathleen Drew
Rebeka Eston Salemi
Thomas Fisher
Michael Flynn
Holly Ghazey
Susan Gillis
Danielle Harrington
Elaine Herzog
Francine Hiller
Kirsten Lee Howard
Liliana Klass
Leslie Kramer
Melissa Lee Andrichak
Kelley Lee Sadowski
Jennifer Levitan
Mary Lou LoVecchio
Kristen McEnaney
Maura McGrail
Kathe Millett
Florence Molyneaux
Amy Monkiewicz
Elizabeth Monopoli
Carol Murray
Robyn Musser
Christine Norrman
Deborah O’Brien
Timothy O’Connor
Anne Marie O’Reilly
Mark Paige
Margaret Riddle
Karen Schweitzer
Elisabeth Seyferth
Susan Smith
Debra Sorvillo
Shoshanah Starr
Janice Szymaszek
Karen Tobin
JoAnn Trauschke
Ana Vaisenstein
Yvonne Watson
Michelle Woods
Mary Wright

Advisors
Deborah Lowenberg Ball
University of Michigan

Hyman Bass
Professor of Mathematics and Mathematics Education
University of Michigan

Mary Canner, Principal
Natick Public Schools

Thomas Carpenter
Professor of Curriculum and Instruction
University of Wisconsin-Madison

Janis Freckmann
Elementary Mathematics Coordinator
Milwaukee Public Schools

Lynne Godfrey
Mathematics Coach
Cambridge Public Schools

Ginger Hanlon
Instructional Specialist in Mathematics
New York City Public Schools

DeAnn Huinker
Director, Center for Mathematics and Science Education Research
University of Wisconsin-Milwaukee

Jim Kaput
Professor of Mathematics
University of Massachusetts-Dartmouth

Kate Kline
Associate Professor
Department of Mathematics and Statistics
Western Michigan University

Jim Lewis
Professor of Mathematics
University of Nebraska-Lincoln

William McCallum
Professor of Mathematics
University of Arizona

Harriet S. Pollatsek
Professor of Mathematics
Mount Holyoke College

Debra Shein-Gerson
Elementary Mathematics Specialist
Weston Public Schools

Gary Shevell
Assistant Principal
New York City Public Schools

Liz Sweeney
Elementary Math Department
Boston Public Schools

Lucy West
Consultant
Metamorphosis: Teaching Learning Communities, Inc.