Changing practices in schools is a very complex endeavor. This paper is about new practices we prompted to foster collaboration and critical reasoning in science classrooms: the presentation of pictures representing different perspectives, small group synchronous argumentation, and moderation of synchronous argumentation. A CSCL tool helped in…

Three studies on teacher planning procedures are described and synthesized--a survey, a laboratory study, and a series of case studies. The primary goal of this research was to determine how teachers plan classroom activities, why they plan in certain ways, and what is the relationship between teacher planning and teaching effectiveness. A survey…