Networked Dynabooks (Score 1)

You seem to be looking for something like Dynabooks. The term Dynabook ("A dynamic medium for creative thought") was invented decades ago by Alan Kay.)

Have a look at the activities of Mark Guzdial and the Collaborative Software Laboratory at Georgia Institute of Technology.

And - yes, they are using Squeak, an open source implementation of Smalltalk-80 which is lead by many of the original Smalltalk inventors including Alan Kay.