“…New teachers, although intent on teaching science for all, also find it difficult to start instruction from the knowledge, interests, and experiences of their students; many underscore the importance of student-centered classrooms, but continue to implement teacher-centered curriculum and instruction (Simmons et al, 1999). Forces outside beginning teachers-students, curriculum materials, course requirements, and school structures-further constrain their efforts to describe the nature of science in contemporary ways or to engage students in rich and varied investigations (Adams & Krockover, 1997;Brickhouse & Bodner, 1992;Munby, Cunningham, & Locke, 2000;Trumbull, 1999). Additional research is needed to more fully understand "how teachers learn to teach demanding content to all students, a question that is central to the current reform agenda" (Feiman-Nemser & Remillard, 1996, p. 85).…”