I have designed a system that includes some little locking mechanisms and other unique tools for my classroom, hopefully creating less hassle around cellphone use during class. I would like to have feedback on whether this is a good idea or not. Here is a short synopsis of what I am planning: The student's materials and the piece they are working on are all locked away on a shelf. To access their materials and piece, they must slip their cellphone in a slot by their shelf. Pushing the cellphone into this slot locks the cellphone inside and unlocks the student's materials and their piece. The materials and art are in a shallow tray or on its lid. They bring their tray over to the worktables and slip it into a slot that unlocks the chair so they can sit down. The tray is now locked in place, but they can still access its interior. The tray's lid becomes their work surface flush with the top of the table's slot. To unlock the tray, they must push in their chair and return the tray and lid to the shelf, unlocking their phone. What do you guys think?