Merriam-Webster's site for kids has a student dictionary, Daily Buzzword, and interactive word games. Includes homework help and lesson plans for parents and teachers.

Search on several different dictionaries, an encyclopedia, and the web.

A dictionary and thesaurus in one. Also gives parts of speech and examples for more than 50,000 words.

Offers games, quizzes, contests, homework help, and reference facts on topics such as space, presidents, the environment, animals, geography, and historical birthdays.

Offers in-depth information on a variety of subjects and educational activities for children.