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.
Team building activities- day of school. Snap the spaghetti into smaller pieces. Push the ends of the spaghetti into the marshmallows to build different shapes for your tower. maybe a party game of who can build the tallest structure.