Free web-based education site with comprehensive features for teachers, students and parents.
Anyone can teach and/or learn using the system, whether it's at school, at home, or on the move.
T. Schummer, S. Lukosch, and R. Slagter. Groupware: Design, Implementation, and Use, 11th International Workshop, CRIWG 2005, Lecture Notes in Computer Sciecne 3706, page 73-88. Berlin Heidelberg, Springer-Verlag, (2005)