I have learned something in the last year that I want to pass on:
Creating a set of standards for a computer lab is one thing. Turning this into a working contract is better.
Attached are two documents. One is the powerpoint I use with the class to go over course procedures. The other item is a skeleton outline that students will fill out to cover my addressed protocols for classroom procedures. Students will sign the copy and turn this in. Procedures Worksheet for Computer courses
Procedures for Computer courses
I use this contract with my students and refer to it when someone or something is not following procedures. This has proven effective for where students put backpacks in the room to ensure safety and it also allows me to adhere to standards that I have already established.