Math Playground is a website that has several games for various ages that allow students to practice math and logical thinking skills.  Topics covered include addition, subtraction, multiplication, division, pre-algebra, fractions, decimals, geometry, and percents and ratios.  The website also includes several online math tools such as fraction blocks, pegboards, chart generators, and a bank of word problems.  Some of the games even have options to play the multiplayer version with other classmates.  Math Playground is also starting a new section of their website that includes language arts  problems to help students develop their reading comprehension skills.

Website: http://www.mathplayground.com/
Subject: Math and Logic
Grade Level: 1-6
Price: Free