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…

Scrutinizes the assessment of students' practical skills, in an honors-level biology examination, for construct validity utilizing both correlational and factor analytical methods to explore relationships between students' practical (laboratory) and theoretical (written) performances. Indicates that teacher assessment of practical skills resulted…