Techcrunch Disrupt happened this past weekend and one of the great startups that showcased their product was Desmos, a free online collaborative tool that's focused on the education sector. I signed up and tried out their web app (offline program also available), the editor is quite good (lots of options), the app is very intuitive and educators can collaborate on a whiteboard (file) in real time. Apps like these are badly needed in the educational world to stop the fragmentation associated with new technology. I will definitely be giving this a try for the Fall 2011 semester. Long-live the cloud!