I saw this product on one of our favorite "idea websites" and decided to "make it my own".
You can give each student a single 1-20 strip to complete when you get ready to go over a quiz or test (I cut them out ahead of time and give them to my students as they enter class.)
First, students records the letter answer under the number from their quiz or test. As we discuss each question, I have students color the ENTIRE box green if the answer is correct.
I have students ONLY color in the tiny box YELLOW for the "good" / "almost" answer, and RED if the student choose an obvious "bad" /"no way" answer.
Not only can you can compare classes, you can use the strips to build or rearrange student groups (i.e. everyone who missed #7 get in small group A), they are also an easy visual for parents, students, and administrators to understand (GO for the GREEN!!)
If I can help or if you have questions about how I use them with my students please send me a message!
Happy Teaching Y'ALL!!!