Educational Insights Hot Dots Place Value Cards Practice place values with this interactive card set! Set includes 50 double-sided, fully-illustrated cards for 100 place value problems. Problems include representing values, ordering numbers, reading and writing numbers, ordinal, even, and odd numbers, rounding, and more. 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).