Ask Jeeves
Excellent site for any subject.

Encyclopedia of New York State
Especially good for History, also a place for Teachers to get their students involved in the process of developing the Encyclopedia.

Lightspan
FREE education portal for educators, parents, and students, providing resources, research tools, and grade-specific activities.

Learning Planet
Educational site that combines games and learning. Games include: Crossword Puzzles, Word Searches, Mr E.'s Memory Game and Rats. Games for Grades 1-3 and Grades 4-6.

Education Place Has sites for Mathematics, Science, Social Studies and Reading/Language Arts

Fun Brain
Excellent site for Educational games, especially for Math and Science, but other subjects are also dealt with.

Think Quest
The Think Quest programs encourage the advancement of education through the use of technology.

The Iditarod