Variables and patterns :  by Glenda Lappan, James T. Fey, William M. Fitzgerald, Susan N. Friel and Elizabeth Difanis Phillips 
introducing algebra / 
 - Boston, Mass. :  Pearson,  c2009. 
 - xi, 111 pages :   illustrations 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9780133661927 013366192X 
<br/><br/><label>LCCN: </label>2012018284 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching--Curricula--United States.<br/>Curriculum planning--United States.
<br/><br/><label>LC Class. No.: </label>QA 157  / .V373 2009 
<br/><br/><label>Dewey Class. No.: </label>510.71/073