“…Nevertheless, we have no direct data on her actual practice. A teacher's reflection on his or her own conceptions is known to be an important factor for there to be a beginning toward changing classroom practice (Briscoe & Wells, 2002). Several studies have found, however, that, depending on the teacher and the context, conceptions and practices are often out of phase with each other, and even plainly in contradiction, and that changes in one are not necessarily accompanied by a change in the rest (Freitas et al, 2004;Lederman, 1992;Marx, Freeman, Krajcik, & Blumenfed, 1998;Mellado, 1997Mellado, , 1998Meyer, Tabachnick, Hewson, Lemberger, & Park, 1999;Roehrig & Luft, 2004;Simmons et al, 1999;Solís & Porlán, 2003).…”