These cards are for students to self assess and let the teacher know where they stand. Its more like the "thumbs up", "thumbs down" system but with cards. I normally cut them and glue them to red, yellow,green and blue construction paper and place them in a ring so students can switch for their choices. You can also print them on their respective construction paper color. The numbers and the letters I normally put front and back on a blue card so if are doing answer choices that go from A-D or 1-4 they can point to their response.