Anybody have a tried and true way to keep 24 rowdy 4th graders quiet in the hallway? Sometimes during the week, I have just half the class and it really works to give quiet ones tickets that they write their name on and put in a jar. Then, at the end of the month, anyone with 10 or more gets a prize. But, with the bigger group, it doesn't seem to work as well. I've also told them that every time we have to stop and get quiet again, they lose marbles from the class jar.