Acceptable Technology Use Policy
My school district uses an acceptable technology use policy very similar to the one below. It is sent home with students during the first week of school every year and it's also located in the student policy handbook.
http://www.hillsboro.k12.oh.us/docs/AUPRevised71820111.pdf
https://www.youtube.com/watch?v=vr01S8Zgrc4&t=42s