FlockDraw is a collaborative tool that allows users to draw and paint in real time. Students can use this tool to collaboratively create an illustration of a story, an event, a famous person, etc. The teacher can set up the meeting, and then give students the URL to connect. No registration is required and the tool is free to use.

The final drawing can be saved (a URL is assigned) and can be viewed in the FlockDraw gallery.

Sample:

Solid, Liquid, and Gas

It can also be embedded into your blog, wiki, or website.