Reading/Language Arts

Math

Phonics
Seussville University
Picture Dictionary
Room 108 Reading, Writing and Spelling
ABC Activities

Ask Dr. Math
Homework Helper (A+ Math)
The Math Forum Student Center
Math Glossary

Science

Social Studies

All About Space
The Nine Planets
Star Child
Environmental Science
Bubbles
Digital Library
Science Learning Network
Optics for Kids
The Yuckiest Site on the Internet
Science Daily

Presidential Coins
The American Presidency
CIA World Factbook
World Time Zones
Official U.S. Time Clock
HyperHistory Online
Time for Kids
Kids National Geographic

Spelling

Etc.

Spell It Right
Basic Spelling Rules
More Spelling Rules

The World of Music
Creating Music
Art Kids Rule
Pics 4 Learning