Schulte Grid Puzzle

Schulte Grid Puzzle is a effective attention training game. Many people feel that they can not settle down to reading, learning or serious work. The key problem lies in that their attention can not be concentrated. Procrastination can be eliminated through attention training.
You need to select all the numbers in the correct order in a 3 x 3 - 8 x 8 grid as fast as you can. Once you reach the average standard of the level, the next level is unlocked.
You can also view the top 5 player with best records!