The follwing is a list of rules when using technology such as computers, tablets, and cameras in the classroom: 
1.) Make sure your hands are clean when using a device.
2.) Never bring food or drink around devices.
3.) Check your device in and out using the check-in/checkout sheet.
4.) One person per device unless approved by teacher.
5.) Only use apps and websites approved by the teacher.
6.) Only take pictures and videos when approved by a teacher.
7.) Stick to the learning objective when using a device.
8.) Only use devices when sitting down.
9.) Never leave a device unattended.
10.) Return device to its designated spot when you are done using it.
Technology Rules for Your Classroom Video: https://www.youtube.com/watch?v=oXe3UeXLQbI
Resources:
10 Classroom Rules for Using Technology: http://blog.whooosreading.org/10-classroom-rules-for-using-technology/
Technology Rules: https://blog.typing.com/10-classroom-rules-using-computers/
Elementary Technology: https://www.sharon.k12.pa.us/Page/29