All Students Can Shine: Apps For Classroom Management Too Noisy Meter, Name Selector, Group Creator! I've used this too noisy app before.
Awesome suggestions from a teacher on free iPad apps that can help with classroom management. Includes a timer, random student selector, team selector, noise management, and more.
The app Too Noisy has a smiley face and a noise meter that moves to show students how loud or quiet they are talking.