Math sites for students
RIF Reading Planet for Kids
Science For Kids
Science Toys:Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles."
Cool Science for Curious Kids: from the Howard Hughes Medical Institute; explore biology with all sorts of really interesting articles and interactive games.
MadSciNet: Anything called the "24 hour exploding laboratory" just can't be wrong.
NASA Kids Club:Anything from NASA is bound to be incredible, and NASA Kids Club is no exception to that.
History for Kids
History for Kids: all sorts of good stuff here, organized by regions (China, India, West Asia, etc.).
America's Library: from the Library of Congress. Meet famous Americans from history, explore the United States, and watch videos or hear audio from American history.
Castles on the Web: an exhaustive resource for kids who'd like to learn about castles.
This Day In History: a great feature that helps kids get into history. It's especially fun to see what happened on your birthday.
BBC History for Kids: so much good stuff here. Interactive timelines, games, and lots of great information.
Government Sites for Kids
FirstGov for Kids: a portal to lots of great kids government sites; includes information on health, homework, money, arts, computers, etc.
White House Kids Home Page: history of the White House and personal notes from the President and Vice President, videos, quizzes, and more.
FEMA for Kids: Get educated about preparing and preventing disasters from Herman the FEMA spokescrab.
EPA Environmental Kids Club: Kids can get information here about anything to do with the environment; air, water, recycling, even an "Ask EPA" feature.
Ben's Guide to US Government for Kids: Pick an age range and then start exploring; there's a ton of great information here.
The United States Mint for Kids: find out all about the United States Mint, currency, and coins.
Legal Match: A Listing of Government Agency Pages for Kids
Kids Books and Kids Stories
Storyline Online: from the Screen Actors Guild Foundation; an online streaming video program featuring SAG members reading books out loud.
Seussville: come on, it's Dr. Seuss!
The Magic School Bus: The Magic School Bus has done more to advance interest in science with my kids than almost any other resource.
Harry Potter: fans of Harry Potter will enjoy this site full of great Harry Potter news and fun interactive games.
Little House on the Prairie: A timeless set of stories, and a great companion Web site.
International Children's Digital Library: "a library for the world's children...."that provides free access to children's books from around the world."
StoryNory: free children's audio stories; great for burning onto a CD.
Kiddie Records Weekly: kids love listening to these classic stories.
General Kid Web Sites
PBS Kids: All the best PBS kids shows are represented here, from Barney to Mr. Rogers, and each show has its own games and interactive educational fun stuff.
Discovery Kids: Discovery Kids is a great kids portal, with lots of fun interactive games, videos, and information about various shows on the Discovery network.
National Geographic Kids: One of the best sites on the Web for kids. Games, cartoons, even a printable coloring book.
HowStuffWorks: Want to know how pretty much anything works? This is the place to go.
Sports Illustrated for Kids: a great way for kids to learn about their favorite sport.
Smithsonian Kids : From Art to Zoo, the Smithsonian has something to interest kids and students of all ages.
Fact Monster: Lots and Lots of cool and interesting facts.