Educational Insights Hot Dots Math Flash Cards- More Addition Master addition in no time with Hot Dots Math Flash Cards! Set includes 50 double-sided cards for 100 interactive addition problems using numbers 10-19. 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). Perfect for independent, self-paced learning.