• Yahoo! Kids: The Web Guide for Kids
• Factmonster
• KidsClick! Web Search for Kids by Librarians
• Ask for Kids
• BJ Pincheck's Homework Helper

Science/Math

• Ask Dr. Math
• Math.com - Free math lessons and homework help
• CoolMath.com
• Kids Bank

Art

• Getty Museum
• Smithsonian Museum
• WebMuseum, Paris

Social Studies

• Ben's Guide to U.S. Government for Kids
• U.S. Constitution
• Facts about the United States
• Country Reports
• 50 States
• The World Fact Book

History

• History of Wyoming
• Events the Year You Were Born
• Oregon Trail
• The Underground Railroad
• Hyper History

Biography

• Biography Sites
• Biographies from Revolution to Reconstruction
• Presidents of the United States
• Biography Channel