"I love, love, love 100s Board. My child has cp, and he has to learn to do math in head because he cannot write on his own.....yet! We use the 100s Board almost daily, and it is always on my list of top 5 apps. He does addition, subtraction, counting coins, even time, as well as the regular things you'd do on a 100s board . . . It has truly been life-changing for my son as far as math is concerned." - One Happy Mom! The 100's Board app is exactly that! A digital 100's board that can show and hide all of the numbers to 100. Numbers can be pressed to change from black to red. All numbers can be hidden or shown at the same time, or in rows / columns of ten. Ten draggable counters are also included for even more fun and games! This is a great educational K-12 app for helping children with their mathematics, making sense of numbers to 100. 100's Board can be used for counting in 1's, 2's, 5's and 10's or can be used for any number of math games such as 'squeeze' or 'guess my number'. Great in the classroom, at home, or on the move!