Astronomy and Space
Challenger Center for Space Science Education (http://www.challenger.org) Information on comets, Mars, Earth, the moon, International Space Station, the Space Shuttle, space probes and the solar system in general.
NASA Kids (http://www.nasa.gov/audience/forkids/kidsclub/flash/index.html) NASA has created this site for kids, which is full of information and interactive activities.
Nine Planets (http://seds.lpl.arizona.edu/nineplanets/nineplanets/nineplanets.html) This site presents the history, mythology, and current scientific information about the planets, dwarf planets, and their moons. The sun is also discussed as well as objects such as Haley's Comet and the asteroid belt and the Oort Cloud.
Ways of Knowing Trail (http://www.brookfieldzoo.org/pagegen/wok/index_f4.html) Take an environmental adventure with four local children through the Ituri Forest in cental Africa.
What It's Like Where You Live: Biomes of the World (http://www.mbgnet.net) The site provides maps and basic information about biomes.
The World's Biomes (http://www.ucmp.berkeley.edu/exhibits/biomes/index.php) Provides information on various types of biomes including aquatic areas, deserts, tundras, grasslands, and forests.
All About Dinosaurs (http://www.ZoomDinosaurs.com/subjects/dinosaurs/allabout/) This is a great site for information about dinosaurs, and it has some fun links.
Species and Other Animals
Animal Diversity (http://animaldiversity.ummz.umich.edu/site/index.html) At this site, visitors can find out all sorts of information about various types and species of animals.
ASPCA's Animaland (http://www.aspca.org/site/PageServer?pagename=kids_home) This child-friendly site offers interactive information on careers, animal care, and general information about animals.
Ask Dr. Math: Elementary School Level (http://mathforum.org/library/drmath/drmath.elem.html) Did you ever wonder who uses calculus in their everyday life? Dr. Math has the answer to this question and many others about mathematics.
Ask Dr. Math: Middle School Level (http://mathforum.org/library/drmath/drmath.middle.html) Did you ever wonder who uses calculus in their everyday life? Dr. Math has the answer to this question and many others about mathematics.
National Parks Service (http://www.nps.gov) Information about National Parks can be found at this site. This includes campground information, regional maps, and alphabetical index. There are also links to historical information.
United States Geological Survey (http://www.usgs.gov/) Check out this site for information about various types of natural disasters as well as information about some specific examples of each type. Just scroll down and choose the type of disaster you want information about.
Cool Science for Curious Kids (http://www.hhmi.org/coolscience/) Created by the Howard Hughes Medical Institute, this site offers both on-line and off-line science activities for children of all ages.
Energy Quest (http://www.energyquest.ca.gov/index.html) Information about the various kinds of energy can be found at this site, which was created by students. The site also has a number of science projects links.
National Caves Association (http://cavern.com/) The Official Site of the National Caves Association. Besides information about the organization itself, the site discusses why exploring caves is fun and has pictures of "spotlight" caves. Great for anyone planning to visit caves.
Science Buddies (http://www.sciencebuddies.org/) Science is an organization empowering students from all walks of life to help themselves and each other develop a love of science and an understanding of the scientific method.