This video is from the Teaching Channel. (By now you have learned that this channel is my obsession). I was drawn to it because a high school English teacher actually uses this formative assessment strategy. Students use a post-it note at the end of class to write what they learned (green light), their ideas and questions (yellow light), and if anything stopped their learning during class (red light). This is not only data on student learning but data for the teacher about what went well and what didn’t. I would take the red light information and try to avoid it (if it was a distraction, etc.) or work through it (if it was a lack of clarification) the next class. What students learned can help direct the next lesson because you will not have to guess their understanding. This is a fun way of doing an exit slip and I think using this from time to time would change it up. It also provides closure for the students and is easy to administer. This is almost an adaptation of the red, green, and yellow cups from the Classroom Experiment.