• Ask Kids
  Designed exclusively for young people ages 6–12. It's a free, safe, fun way for kids and their parents to quickly and easily research school topics like science, math, geography, language arts, and history in a search environment that's safer and more age-appropriate than traditional, adult search engines.

Fact Monster Easy-to-use homework help for a wide variety of subjects. Also includes games and quizzes, "Cool Stuff," and a reference desk with searchable atlas, almanac, dictionary, encyclopedia, timelines, and more. Part of the Family Education Network.

• KidsClick!
  Search more than 600 subjects organized into 15 categories. Selected by the Association for Library Service to Children as a "Great Web Site." KidsClick!© is owned and run by the School of Library and Information Science (SLIS) at Kent State University.
   
• Yahoo! Kids
  A colorful, graphic, interactive interface. Play games, watch music videos, check out movies, learn about science, read jokes, send e-cards, learn Internet safety, get homework help, ask questions, and explore an encyclopedia.