%0 Book %E Tippins, Deborah J. %E Koballa, Thomas R. %E Payne, Beverly D. %I Allyn and Bacon %D 2002 %C Boston %G English %@ 0205305881 (alk. paper) %@ 9780205305889 (alk. paper) %T Learning from cases : unraveling the complexities of elementary science teaching