40 Kid-friendly math cartoons, problems, and questions.Comprehension of math vocabulary terms is crucial to math success and humor is an effective way for students-even struggling students-to understand and recall important information. The front of each card in this set introduces a key math term, using a funny, kid-friendly cartoon. The term is repeated in a question or problem on the back of each card, reinforcing comprehension. Use with the Hot Dots® pen for a fun and interactive way to practice math vocabulary. Pen sold separately.