The workshop will open various perspectives on construction of knowledge in classrooms and on the role of teachers and tutors in this endeavor. The workshop will be of an interdisciplinary character with scientists in developmental and cultural psychology, in mathematics and science education, in computer science, and in argumentation theory. The workshop will focus on school types of dialogues and on the design of activities in successive sessions. Also special stress will be put on mathematics and science education.

The workshop will consist of 10 sessions. Sessions 1, 2, 3, 5, 6, and 9 will each last half a day (9:00-12:30 or 14:30-18:00) and have a standard 3.5 hour format as follows:

· Two introductory lectures and a reaction of 25 minutes each.

· Coffee break (30 minutes).

· Panel discussion (60 minutes), initiated by 5 minute statements of panel members who have not lectured / reacted in the same session.

· Open discussion (45 minutes) leading into lunch or dinner break.

Session 4 will consist of two public lectures (45 minutes each, followed by a questions and answers period).

Session 7 will be a hands-on technology session.

Session 8 will include hands-on experience with technological environments.

Session 10 will be a summary discussion and closing session.