This would make a great procedure (Harry Wong). Count to five or hold up one finger at a time when the class needs to refocus. Discuss what occurs for each number at the beginning of the school year and eventually the reaction will be automatic.
The Behavior Alert shows the rules that were broken, and the students, as well as their parents, need to sign this. This is a great way for the parents to track their children's behavior and the teachers can also alert the parents if there are issues.