Differentiated science inquiry / Douglas Llewellyn. Llewellyn, Douglas. Science Study and teaching (Elementary) Science Study and teaching (Middle school) Elementary school teaching. Middle school teaching. Effective teaching. LB1585 .L55 2011 507.1 22 LLD Includes bibliographical references (p. 141-142) and index. Thousand Oaks, Calif. : Corwin Press, 2011. 2011. 2011 Text xvii, 146 p. : eng