“…In most of the studies with substantive effect sizes, there was an underlying assumption that students should be taught content at deep conceptual levels rather than more superficial factual-type knowledge. Indeed, in many of the mathematical and science studies, the shift from factual mastery to conceptual inquiry-based knowledge was particularly evident (see, e.g., Adey, 2004;Cardelle-Elawar, 1995;Carpenter, Fennema, Peterson, Chiang, & Loef, 1989;Cobb et al, 1991;Confrey, Castro-Filho, & Wilhelm, 2000;Fennema et al, 1993;Higgins, Irwin, Thomas, Trinick, & Young Loveridge, 2005;Kahle, Meece, & Scantlebury, 2000;McClain & Cobb, 2001;Palincsar, Magnusson, Marano, Ford, & Brown, 1998;Parke & Coble, 1997;Raghavan, Cohen-Regev, & Strobel, 2001;Saxe et al, 2001;Schorr, 2000;University of Hawaii Curriculum Research and Development Group, 2002;Wood & Sellers, 1996).…”