Great start; very handy and easy to implement in or out of the classroom.. WHAT IT NEEDS: *****Derive acceleration graphs from velocity graphs.... Easy programing fix **Export files directly to drop box, right now you have to email it out then import them into dropbox from your email, **Also export the data in an excel or csv file for other uses would be nice.. It would be nice to see: and perfect if *A little bit harder to understand mathematically but still easy to program, be able to not only rotate the origin for a tilted camera but be able to show the plane that is of interest incase you are filming something thats not directly perpendicular to the camera... Thanks a lot! Good start!