A fun and interactive way to master math skills featuring the Hot Dots Pen that uses sounds and lights to reward correct answers and gently redirect incorrect responses.Characteristics:Two book set includes 85 2nd grade lessons in math, including counting, numbers, patterns, time, shapes, fractions, measurements, money, place value, algebra, and other math facts. Plus 15 advanced learning lessons, for a total of 100 lessons to help children learn all they need to know about math. Includes Hot Dots Pen (2 AAA batteries required, not included).Age:7 years and up