Open-ended math problems- 6-8 The problems are divided into 5 mathematical strands, which makes it easy to search for an exact type of problem that you are looking for.
The Math Problem Site - 3-12 Interesting math puzzles that seem easy, but can be quite tricky.
Enriching Mathematics - 6-12 A batch of great math puzzles that will drive you crazy.
National Library of Virtual Manipulatives -K-12 The problems are divided into the 5 mathematicalstrands. A variety of activities to choose from.
Figure This! Math Challenges for Families - K-12. Real-life math problems that the family can solve together. Supported by the National Council of Mathematics.
Nick's Mathematical Puzzles - 8-12 Good luck with these!
Reader’s Theater - 2-9 This website is a great resource for scripts, and how to do them effectively.
Lexile - K-12 A fantastic way to find books at your reading level.
Scholastic - K-12 Neat interactive activities that are sort-able by grade level.
Interactive Poetry Site - 3-12 Same concept at language across borders except with poetry.
Newslink - 2-12 Find any on-line newspaper.
Literature Trivia Links - 2-12 All sorts of trivia sites based on literature.
Alice - 5-12 Free educational software that teaches students computer programming in a 3d environment.
PBS Design Squad - K-8 Build projects based on the great PBS show.
Windows to the Universe -- Activities - K-8 Well done website regarding space, the earth and more.
http://www.learn4good.com/games/simulation.htm - on-line simulation games
National Geographic- 4-12 Interactive games teach all the geography standards.
Scholastic - K-12 Neat interactive activities that will challenge all grade levels.
Central Intelligence Agency World Factbook - K-12 Contains information on every country of the world.
CIA Home Page for Kids - K-8 Games and resources regarding the CIA.
NY Times Weekly Current Events Quiz - 4-12 Daily current event quizzes in a multiple choice format