Teacher-student discourse continues to be teacher-centred even though researchers and reform documents have recommended changes toward increased levels of student-centred discourse. In science education this situation is paralleled by effort to make scientific inquiry more student-centred. The purpose of this study was to investigate how discourse…

The authors describe an evolving theoretical framework that has been called one of the best kept secrets of academia: cultural-historical activity theory, the result of proposals Lev Vygotsky first articulated but that his students and followers substantially developed to constitute much expanded forms in its second and third generations. Besides…

Reports on learning when engaged in a four-month experience of co-teaching a water unit in a seventh-grade classroom. Suggests that co-teaching allows for a mode of learning that is not captured by Schon's notions of reflection-in-practice and reflection-on-practice. Concludes that co-teaching, as co-learning, is praxis. Contains 26 references.…