3-2-1 exit slips are a great way to check for understanding. Students write 3 things they learned about (whatever subject you are discussing), 2 things they still don't understand, and 1 thing they want to know more about.
Please note this file is in PDF format. If you need it in a different version, please contact me. This sheet prints 3 to a page.
Please let me know if you have any questions.