Parents and Teachers: The MrNussbaum 46-game APP is FREE THIS WEEK on iTunes and Google Play. Please send feedback (and of course any positive reviews).
Grade levels 
 

Mathepillar

Mathepillar is an outrageously fun game in which players have to order falling numbers on a number line by positioning their caterpillar in the correct place to catch the numbers. There are four stages to the game, and each stage presents a slightly more complicated number line or pattern. If a player can pass all four stages, he or she can print out one of six limited edition butterfly certificates, each featuring a different species of butterfly. Try to collect all six!