Lappan, Glenda. Say it with symbols : algebraic reasoning, teacher's guide / Glenda Lappan, James T. Fey, William M. Fitzgerald, Susan N. Friel, & Elizabeth Difanis Phillips. - Glenview, Illinois : Prentice Hall, 2004. - 152 pages : illustrations ; 28 cm. Includes index. ISBN: 0-13-180802-8 Pbk, Bp. Subjects--Topical Terms: MathematicsAlgebraChart LC Class. No.: QA 135.6 S29 2004 LC Lib