TY - BOOK AU - Sobel,Max A. AU - Maletsky,Evan M. TI - Teaching mathematics: a sourcebook of aids, activities, and strategies SN - 0205292569 AV - QA11 .S663 1999 U1 - 510/.71/2 21 PY - 1999/// CY - Boston PB - Allyn and Bacon KW - Mathematics KW - Study and teaching (Secondary) N1 - Includes bibliographical references and index ER -