Here is a list of 6 classroom rules that are written in a positive form, with the addition of scripture. They use bright colours, and easy to read fonts. The file is in PDF form making it easy to print and laminate. Scripture used is from NIV.
Sample rule: Always have a positive attitude
1 Thessalonians 5:16-18
Be joyful always; pray continually; give thanks in all circumstances, for this is God’s will for you in Christ Jesus.
Do everything without complaining or arguing, so that you may become blameless and pure, children of God without fault in a crooked and depraved generation, in which you shine like stars in the universe.