Posamentier, Alfred S. 101 great ideas for introducing key concepts in mathematics : a resource for secondary school teachers / by Alfred S. Posamentier and Herbert A. Hauptman. - Thousand Oaks, California : Corwin Press, 2001. - xiv,225p ; 25 cm. Includes bibliographical references. ISBN: 0761975128 CIP entry 0761975136 (pbk. : acid-free paper) 9780761975120 9780761975137 Subjects--Topical Terms: Mathematics--Study and teaching (Secondary)