You will not believe the difference hand signals can make in your classroom! Wow, no longer will you get interrupted in the flow of a lesson. This help my lessons go smoothly and I wouldn't ever go back to teaching without them.
I like simple and clean looking things in my room so I created this small 81/2 x 11 inch print out. Stuck it on the board and a couple weeks into school my students are able to use these no problem.