I have just discovered this tool, I think it can be very useful for teachers. It is an online tool for collaborative whiteboards. It allows:
-Conduct brainstorming realtime collaboratively.
-Merge multiple screens, turning the board into a standard presentation "Prezi"
-Working with images stored in Google Drive
- Upload images
- Draw
- Write
- Put sticky notes
- Framing or placing figures
- Linking ideas and view it as a slideshow.
- Chat with collaborators
- Etc