Here is an option to help curb that issue!
These are student triangular prisms (kind of). Print, cut, fold, and glue. Give one to each kid to have on their desk. You explain that they can aim the color side that matches how they are doing toward the teacher. This will allow the teacher to SEE who needs help without kids distracting others! While this is nifty, it isn't may original idea, just my original creation for my store.