Developed by the National Council of Teachers of Mathematics with funding from Verizon Foundation, the Pick-a-Path mobile app is based on the Decimal Maze from the popular lesson Too Big or Too Small. The game is played by navigating Okta from top to bottom — adding, subtracting, multiplying and dividing as you go! Earn 1, 2, or 3 stars by completing various mazes involving integers, fractions, decimals, exponents, and more.
http://illuminations.nctm.org/pickapath.aspx