Use this formative assessment tool to assess your students learning! Print the colored stop light on cardstock, fold vertically, attach a large popsicle stick to one side then close and tape shut. These can be handed out to students or left in a basket in the center of the table for quick access. Students should use a clothes pin to mark their light when instructed. The backside explains what each light means while the front side will indicate to the teacher where his/her students are in the learning process. This formative assessment tool is very useful for making sure students don't get left behind at a red light!