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…

In this paper, I review both mathematics education and CSCL literature and discuss how we can better take advantage of CSCL tools for developing mathematical proof skills. I introduce a model of proof in school mathematics that incorporates both empirical and deductive ways of knowing. I argue that two major forces have given rise to this…

Critical reasoning has been recognized as a valuable educational goal since the end of the nineteenth century. However, the educational programs to reach this goal have changed dramatically during the twentieth century and moved to a dialogic approach. The shift to dialogism in programs to promote critical reasoning brings challenges concerning…