"Fist to five" check students rate their understanding by holding up the appropriate number of fingers. The goal is for everyone to be in the green. Great way for students to self-assess their understanding and help you to gauge student understanding.
Higher Order Thinking Across the Curriculum: Formative Assessment Exit Slips
Math Coach's Corner: Create a poster with a numbered square for each student in your class and assign each student a number. When you want to do a quick assessment, students respond on a sticky note and put it on their numbered square.