Student and Learner Resources
By far the most comprehensive educational website is Kahn Academy. It covers all major areas of study. Topics are covered using a variety of techniques supporting a variety of learning styles. A non-profit organization.
If it's math games you want, this math games site has a boatload of them. These are great games for kids (or adults with a little 'kid' left in them) and the variety is sure to satisfy all different interests. Topics include addition, subtraction, multiplication and division. There are ads, so be careful where you click!