Create letters for your bulletin board using 8 x 11 inch scrapbook paper. You can use Word Art to make fancy letters, or use the fonts available in the program. Print them as “outline with no fill color”.
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.