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.
Teach your kids about the fascinating human body with these fun yet informative activities! (via I Can Teach My child) I'm going to school and will be learning about the human body so this will be a awesome way to teach my kids!