Here's a powerhouse of a poster. It can teach students how to more readily quiet down so you can start class. Once your students have been trained to learn that when the hand goes up, their mouths go shut, you won't have to repeatedly ask for quiet.
This poster reads "When the hand goes up, the mouth goes closed."
Poster #275 is a really effective classroom management tool that can accomplish what mere words can't. It is perfect for elementary, middle and high schools, and can even be easily used in the primary grades.
Teaching is hard work. Poster #275 can make the hardest part a bit easier by taking on some of the classroom management for you. Once Poster #275 is on you wall, students will learn to quiet down almost automatically.