Heddens, James W. Today's mathematics concepts, methods, and instructional activities James W. Heddens, William R. Speer. - 11th ed. - Hoboken, NJ Wiley c2006. - xvii, 421 p. ill. 28 cm. 1 CD-ROM (4 3/4 in.). - Wiley/Jossey-Bass education . ESTE LIBRO INCLUYE UN DISCO Includes bibliographical references and index. ISBN: 0471149845 (pbk. : acid-free paper) LCCN: 2004065767 Subjects--Topical Terms: Mathematics--Study and teaching (Elementary) LC Class. No.: QA135.6 / .H43 2006 Dewey Class. No.: 372.7 / H452t 2006