Sobel, Max A. Teaching mathematics a sourcebook of aids, activities, and strategies [by] Max A. Sobel [and] Evan M. Maletsky. - Englewood Cliffs, N.J. Prentice-Hall [1974, c1975] - xii, 240 p. illus. 24 cm. 920306 Includes bibliographies. ISBN: 0138941394 0138941211 (pbk.) LCCN: 74010874 Subjects--Topical Terms: Mathematics--Study and teaching (Secondary) LC Class. No.: QA11 / .S663 Dewey Class. No.: 510/.7/12