Gary, great idea to improve the use of existing devices through cross platform classroom management app designed for teachers! The video and website layout both make it easy to understand exactly what you are looking to do. As others have mentioned in the comments, there are a lot of other apps out there which perform similar functions (both google and apple have classroom apps now). Emphasizing your apps strengths such as being cross-platform, as well as any other features that distinguish it from the crowd will be keys to success. It is clear that you put time into your PowToon video, it is very easy to understand and uses relevant examples. Your reflections demonstrate that you took a lot away from app creation as a thought exercise. Very interesting model, well done!