iKnowthat.com has online multimedia educational games for kids in grades PreK through 6 (ages 2-12).

Leon's MathBlox Game

MathBlox is an arcade style game that helps kids strengthen their mental math skills and apply math facts to complete addition, subtraction, and multiplication problems.

The goal of MathBlox is to complete number sentences by choosing pairs of number blocks before they stack up and form a wall. For extra fun, there are wildcard blocks, bonus points blocks, and blocks that clear whole columns. Kids accumulate points as they move through levels that present more challenging problems.

There are eighteen topics: Addition - Sums to 10, Addition - Sums to 50, Addition - Sums to 100, Subtraction with Numbers to 20, Subtractions with Numbers to 50, Subtraction with Numbers to 100, and Multiplication with times table facts to 12 x 12.

This game helps kids in 1st grade, 2nd grade, 3rd grade, and 4th grade learn math facts and develop mental computation skills related to several mathematics standards and benchmarks.