Veescope is an amazing and easy to use iPad & iPhone app for creating green screen video effects. It is available for $2.99 in the iTunes App Store and can be used for enhancing student projects or creating a school news program. You don't need expensive film equipment to get amazing results. I have tested the app using green bulletin board/butcher paper as the green screen background. If you have any questions please let me know. I an excited to see how you can utilize Veescope in your class.