This game is for ANYONE who wants to improve their mental math, concentration and listening skills. It's an auditory math game rather than a visual one, meaning you have to listen to the numbers rather than see them. This is useful because it's making you do mental math and not have the computer "write" it for you. The numbers you use is customizable, so you can do addition/multiplication/subtraction/division problems in the 1-10s or problems in the thousands.
To use this resource, just go on the website and play! Please use Google Chrome, as the website does not yet support other browsers yet.