Exit tickets are an excellent type of formative assessment. I asks students if today's lesson improved their previous knowledge & why. The students have the option to write their response or draw (perfect for ELL students or academically struggling students). Students will also circle how they feel about today's lesson and what the most interesting part was. This is perfect for ANY SUBJECT!!
Leave these with your sub to pass out to students who are being awesome while you're gone! They turn them back into you when you get back, for whatever special reward you come up with