This is Summer school with 9th and 10th grade students. A young bunch that still relies heavily on a structure. Last week, this technique worked like a charm. We basically have a break time, but when students talk when a teacher is talking, we start the timer. Last week we only lost 3 minutes of break . Today(a Monday), the class wasted 8 minutes, since they felt their whole break was taken away anyway, so they kept talking, causing multiple attention- getters and redirections. Usually, I had been giving warnings when most students are talking and this method was overwhelming (and tiresome) so I really liked this timer idea. Why did it not work today, and what other method could I rely on to have students work together to not talk over instruction? What can be done better in this method? What do you use? Thanks ahead of time for any help or advice.