Carl Bereiter is a professor emeritus at the University of Toronto who co-founded the Institute for Knowledge Innovation & Technology. He developed CSILE, the first networked system for collaborative learning, and later Knowledge Forum. Knowledge building environments aim to treat students as members of a knowledge building community rather than just learners. They emphasize knowledge advancement for the community rather than individual achievement and focus on improving ideas rather than acquiring knowledge. Discourse is collaborative problem solving rather than argumentation, and emergent understandings are valued over authoritative knowledge.