McDougal Littell Math Course 2 Chapter Resources Book Chapter 9 by Mcdougal Littell Paperback, 112 Pages, Published 2006 by Mcdougal Littel ISBN-13: 978-0-618-74153-3, ISBN: 0-618-74153-4
Passport to Mathematics Teaching Tools: Transparencies and Copymasters Vol. 2 by Ron Larson, Mcdougal Littell Paperback, Published 1999 by Mcdougal Littell ISBN-13: 978-0-395-89646-4, ISBN: 0-395-89646-0