I Can Do That  
   Cartoon characters take you on a tour of cells, DNA, RNA and biological techniques.
   http://www.eurekascience.com/ICanDoThat/index.htm

Quia Biology Activities  
   Games and quizzes for learning biology. Over 10 types of activities to choose from, including matching games, flash cards, hangman, trivia games, and quizzes.
   http://www.quia.com/bio.html

ScienceBob.com  
   Enter the world of Science Bob to try home experiments, visit his on-line lab and get answers to your science questions.
   http://www.sciencebob.com/

eNature.com  
   The complete nature and wildlife resource featuring the Audubon Guides to plants and animals, outdoor planner and destination guide, habitat Guide, eCards, and newsletters.
   http://www.enature.com/

The Visible Embryo  
   Provides a visual journey through the stages of human development from conception to birth.
   http://www.visembryo.com/baby/index.html

The Biology Project  
   Online interactive resource for learning biology. Content includes Biochemistry, Cell Biology, Developmental Biology, Human Biology, Molecular Biology, Mendelian Genetics, and Immunology.
   http://www.biology.arizona.edu/default.html

The Open Door Web Site  
   A Natural Science reference site for middle school students. Includes topic chapters, facts and figures, questions and quizzes. Quick search and index search available, as well as an Internet guide.
   http://www.knockonthedoor.com

Cool Science For Curious Kids  
   Fun and interactive site to help kids appreciate science. Why are snakes like lizards, and monkeys like moose? Find out here.
   http://www.hhmi.org/coolscience/

The Guardians of the Millennium  
   Describes microbiology, the rain forest and the possibility of extraterrestrial life. Also in French, German, and Spanish.
   http://www.theguardians.com/

Biotech Adventure  
   A site intended to teach users about biology and biotechnology. Includes some educational illustrations and animations that can be downloaded by teachers and other educators for use in their curriculum.
   http://biotech-adventure.okstate.edu/

Activities in Biology  
   Provides interactive quizzes on topics such as cell biology, organ systems, ecology, and photosynthesis.
   http://www.syvum.com/squizzes/biology/

Common Teasers in Biology  
   Offers a few facts such as how an insect breaths to why a chameleon can change it's color.
   http://www.geocities.com/mickey_prasad/bio.html

Neuroscience for Kids  
   Text, interactive activities, games, and links about the nervous system. Users may make neuroscience postcards to send to their friends.
   http://faculty.washington.edu/chudler/neurok.html

Science For Kids  
   Offers news about plants, animals, and other life science issues. Also includes pop quizzes, and pictures. Site is available in Spanish.
   http://www.ars.usda.gov/is/kids/

Biology Online  
   Online activities, labs and tutorials. Site available in Spanish.
   http://www.biology-online.org/

Thousand Eyes  
   A volunteer project that observes and records natural history events such as plants flowering, birds returning, frogs peeping, and weather events. Offers a field guide, graphs, maps, and reasons for the project.
   https://www.thousandeyes.ca:447/english_en/index.php

Diversity of Life Web Index  
   Links to information about each of the kingdoms and a glossary of terms.
   http://www.geocities.com/RainForest/6243/diversity.html

Tree of Life Web Project  
   Classification of organisms. Has diagrams showing where all organisms fit into the evolutionary tree.
   http://tolweb.org/tree/phylogeny.html

National Institute of Environmental Health Sciences Kids Pages  
   Games, music, brainteasers, and other activities that introduce children to the impact of the environment on health.
   http://www.niehs.nih.gov/kids/games.htm

Electronic Naturalist  
   Information on North American animals and plants with illustrations, text, activities, and access to a naturalist.
   http://www.enaturalist.org/

OceanLink  
   Facts, in-depth articles, ask-a-scientist forum, archive of answers and newsletter on oceans and ocean life.
   http://oceanlink.island.net/

Wildlife-Our Wild Neighbors  
   Learn about wild animals through online fun and games.
   http://www.nps.gov/aplic/forkids.htm

Online Biology Book  
   Provides concise information on all aspects of biology, from biochemistry and body systems to plants and history.
   http://gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookTOC.html

Biology In Motion  
   Online activities for learning biology, including animated cartoons, an evolution simulation laboratory, and drag-and-drop quizzes.
   http://BiologyInMotion.com/

Living Things  
   A look at individual organisms, communities, populations, species, and ecological food webs.
   http://www.fi.edu/tfi/units/life/

Science Isn't Hard  
   Interactive GCSE Biology website. Some of the topics that it covers are cells, photosynthesis, the nervous system and homeostasis.
   http://www.scienceisnthard.com

Fish Olympics  
   Introduces the natural history of the sea through a fun game.
   http://www.liverpoolmuseums.org.uk/nof/fish/

4-H Embryology  
   Includes guidelines for incubating and candling eggs, photos, movies, egg cam, and resources. Sponsored by the University of Nebraska Cooperative Extension.
   http://lancaster.unl.edu/4h/Embryology/

The Temperate Rain Forest Canopy of the Pacific Northwest  
   Hidden picture of canopy critters, Ask Dr. Canopy, leaf and bark rubbings, poetry, and conservation tips.
   http://academic.evergreen.edu/n/nadkarnn/trf/home.htm

Forest Speaks Exhibit  
   Educational web version of the Visitor's Center exhibit at the Smithsonian Tropical Research Institute in Panama. Includes information on rainforest mammals, frogs, birds and plants.
   http://striweb.si.edu/forest_speaks/

Dr. Farabee's Online Biology Book  
   Well organized and illustrated general biology text from Estrella Mountain Community College, Phoenix, Arizona. Advanced, but very clearly explained and illustrated.
   http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookTOC.html