I like how simple the expectations are on this poster. I think the hearts limit it, and the fact that it continues after a period without a capital letter! But the ideas are good and could extend from lower elementary up through grade 8.
5th Grade NYS Learning Standard CITIZENSHIP AND CIVIC LIFE: Constitutions, rules, and laws are developed in democratic societies in order to maintain order, provide security, and protect individual rights. This is an example of a "classroom constitution" made together as a class. It allows your students to become more comfortable as a learning community. Also students are more inclined to follow and not break their own rules rather than rules that the teacher sets.