Algebra Tiles for Factoring and Solving app for iPhone and iPad

We know from research that having visual representations helps students develop conceptual understanding of algebraic topics. Algebra Tiles help students represent and solve algebra problems using tiles to represent variables and constants. The game consists of solving equations for x, substituting in variable expressions, and expanding and factoring equations. Some of the functions that the app has are the ability to remove zero pairs, rearrange tiles to help visualize the expressions, and add and take away tiles. Other functions:
Selecting tiles of opposite but equal value will be removed.

Copying tiles - Selected tile will be duplicated

Negating the value of tiles - Selected tiles will have their values changed from positive to negative or negative to positive.