Squeak

Squeak is a open source portable version of the Smalltalk programming environment that grew out of Alan Kay's Dynabook concept. It can be used by children at the eToys level to program graphically by assembling objects and scripts. Logo type graphics, learning and applications can be done in eToys as well, including the programming of multiple turtles for simulating complex behavior. Squeak can also be used by developers to write professional programs. The image runs identically on Linux, MS and Apple OS's; there is a separate virtual machine for each OS.

Connectors are one of the built in features of Squeak. Connectors allow you to easily create concept maps, flow charts, etc. with boxes and connecting links.

Active essays can be developed in Squeak. These are similar to books where each page can contain simulations running in real time. Active essays combine a written essay, live simulations, and the programs that make them work in order to provide a deep explanation of a dynamic system. The reader works directly with multiple ways of representing the concepts under discussion. By “playing with” the simulations and code, the reader gets some hands-on experience with the topic.

Scratch is a scripting environment for children being developed at MIT which is built on top of Squeak; http://weblogs.media.mit.edu/llk/scratch/

Squeak has support for Unicode and some work has been done with two of the target languages, Telugu and Hindi. There is a large and vibrant Squeak community that is working on many different aspects of Squeak and educational applications.

• Here is the main Squeak web page: http://www.squeak.org
• And here you can find Squeak applied to educational use such as etoys, active essays and connectors: http://www.squeakland.org