Educational Insights Hot Dots Laugh It Up, Math Vocabulary, Grades 4 to 6 Students laugh their way to a better math vocabulary with this independent, self-paced, interactive learning set. Set includes 40 cards featuring a kid-fun cartoon illustrating a math term and a question or problem using that term on the back. Use as basic flash cards or add the Hot Dots Talking Pen (not included) for instant reinforcement. Touch the pen to an answer dot for positive reinforcement (correct responses) or gentle redirection (incorrect responses). Introduces key grade-level math terms and provides practice with grade-appropriate math problems.