ICT in education: Corkboards

"Flockdraw is a free to use online whiteboard based painting & drawing tool. It makes it easy to draw online free with multiple people for fun or business. You can have unlimited people in a room and the drawing updates in real time. Uses different colors, shapes and text."

Designed for Primary School Students.
No registration required.

Sync.in gives each person their own text color so that you can keep track of who wrote what.