I suggest having your students hand-copy these rules from the Smartboard or projector. When students hand-write the rules, they learn them better, and have little grounds to say "I didn't know that I couldn't do X/Y/Z." (Have a few copies made for students with disabilities or for students who miss class on the day when these rules are shared.) File these rule sheets away, and when a student breaks the rule, enforce consequences immediately and fairly. ***You may want to come up with a set of rules for group work as well.