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.
If you haven't checked out the Class Dojo App.you are missing out. This sight eliminated the need for stickers and treasure chest in my classroom. Instead, I use the tickets as incentive for good behavior in my Prek classroom throughout the week.