More than 1000 challenging math problems and illustrations for grades 1st to 12th.
This is an online animated curriculum-based content that is aligned to state education standards. The site includes video, game, quiz, and activity sections for science, health, writing, reading, social studies, and math based on national education standards.
This is part of Earth Day Canada’s environmental education program for kids. There are Earth-related games, quizzes, activities, printable pages, and more, each broken down by topic.
Booklists, author interviews, puzzles, trivia and more for kids ages 6-12.
Games and activities connected to your favorite PBS programs, including Arthur, Between the Lions and Sesame Street.
Created by Jeff Kinney of “Wimpy Kid” fame, this virtual world invites young gamers to create a character and to undertake age-appropriate quests on over a dozen “islands” based on themes from history, nature, and human culture.
Games, activities, animal cams & videos and sections for the amphibians, birds, insects, mammals and insects at the San Diego Zoo.
Simon offers information about himself and his books (over 250 and counting!) on his official site, along with study guides, science news and videos, a science dictionary and more.
This is the official home of Dr. Seuss on the Web. There are games, you can chat with the Cat in the Hat, win prizes, find out about new Dr. Seuss books and CD-ROMs, and much, much more!
For other great sites, have a look at Great Websites for Kids, sponsored by the Association for Library Service to Children a division of the American Library Association.