Fle3 is a Web-based learning environment. More specifically, it is a server program for computer-supported collaborative learning (CSCL). The Fle3 Knowledge Building tool allows groups to carry out dialogues, theory building, and debates by storing their thoughts into a shared database. While knowledge building, groups may use knowledge types (also called thinking types) to scaffold and structure their dialogues. Fle3 WebTops can be used to store items such as files and notes, organize them in folders, and share them with others. The Fle3 Jamming tool is a shared space for collaborative construction of multimedia data.