This article reports findings from a multi-year study of teachers' conceptual change coincident with the development of instructional expertise among teachers involved in educational reform efforts in schools in Santiago, Chile. Conceptual change in teachers is important because recent research indicates that students of teachers who function at…

In these times of legislative mandates for accountability and high-stakes testing, meeting the needs of diverse learners has never been more urgent. If change is to occur in classrooms across the United States, the change forces will be the administrators and teachers in each school. Educators must now choose a plan of action to address student…