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.
Students take down one smiley face anytime they blurt out. Students can either get 3 blurts per day or week depending on your class - I think I would prefer individual student charts instead of having the whole class on display like this.
Business and management infographic & data visualisation 32 Must-Try Classroom Management Tips – Playdough To Plato Infographic Description -Great ways to calm kids down.-playdoh in balloons to squish, like the faces -