Hand signals help lessen disruptions in class! Teach these SIX signals the first few weeks of school so students know that instead of interrupting your teaching they can use signals to communicate what they need/want.
Depending on the level of Spanish you're teaching, you may or may not need to go over the Spanish phrases. The phrases include:
Necesito beber agua
Necesito ir al baño
Necesito un kleenex
Tengo una pregunta
Tengo una respuesta
Necesito un lápiz
I hope this is as helpful to you as it is for me in my class!