An astronomy and space science education NASA site offers activities and videos for kids.  There is online space exploration on topics like telescopes, galaxies, comets.  Tonight’s sky is a narrated video of features of the current month’s sky.  Under the educators’ area, there are math and science tools, including online photos and charts with accompanying inquiry based activities.

An interactive, on-screen periodic chart letting students learn more about elements and all the pertinent information about the element.

The Animal Planet Homepage covers all things animal, where each week you'll find experts on a special "Creature of the Week," profiles of characters like Steve Irwin, otherwise known as The Crocodile Hunter, and the latest Web stories on just about any critter you can discover.

This organization “promotes the humane treatment of animals in science through voluntary accreditation and assessment.” It offers a student resource section that is designed to help students write research papers or participate in debates on the topic of animal research.

The Biology Corner is a resource site for biology and other science teachers. It contains a variety of lessons, quizzes, labs, web quests, and information on science topics.

The purpose of Blue River Watershed Association -- BRWA is to improve the quality of the Blue River, its tributaries, and nearby streams through education and the development of community partnerships. To achieve this goal, BRWA sponsors several events and programs in the Kansas City Metropolitan Area. BRWA encourages students and other citizens to protect their local watershed.

Hands-on experiments and curriculum materials for teaching science and math from grades 6-12.

Great website with tons of interactives on various science content. Learn about Cell biology, Microbiology, Immunology and Microscopy with models, cycles, puzzles and quizzes. Includes a photo gallery! 

This website helps kids understand the ways that chlorine chemistry affects their everyday lives. Visitors to the site can "explore the branches of the chlorine tree" through activities featuring photographs, videos, animations, sound and text.

ITSI-SU, the Concord Consortium's comprehensive, innovative technologies project, funded by the National Science Foundation, offers teachers ways to engage students in exciting, inquiry-based science projects that use computational models and real-time acquisition. All the the STEM activities involve asking questions and/or defining problems, using models or sensors, collecting data, interpreting results, using mathematics, technology and computational thinking, constructing explanations and/or designing solutions based on evidence. 

This site details how people learned about the universe, a good resource for the history of science. It has sections on the ideas: The Greek Worldview, Start of Scientific Cosmology, Mechanical Universe, Island Universes, Expanding Universe, Big Bang or Steady State, and the Journey Continues. It also has sections on the tools that have been developed since the beginning of time, such as: Naked Eyes, First Telescopes, Early Reflectors, Golden Era of Refractors, Spectroscopy and the Birth of Astrophysics, Rebirth of the Reflector, and New Tools. There is background information including some animations. 

Internet site for Open Source Curriculum. Provides access to free K-12 materials in science, mathematics, language arts and social studies.

The Comprehensive Science Directory. This online science directory is designed to help its users find online science sources, companies, products, services, and information.

Discover Engineering explains what engineering is, describes various careers, and has informational videos and games on engineering.

This site has all types of resources for science, math, English, and social studies. They are divided into K-5, 6-8, and 9-12. Lesson plans include the objective, materials, procedure, evaluation methods, vocabulary and national standards. In addition to lesson plans, the site also has interactive games, puzzles, activities, contests, STEM career information, and virtual labs. 

Earth Life Web is an encyclopedia which supplies information about life on this planet. It includes images, facts, book reviews and recommended reading on several species, divided into sub-domains. Currently includes insects, birds, mammals, lichens, microbes, invertebrates, chelicerata, fish and sharks.

The Science Fair section gives students the ability to access over a thousand helpful ideas and articles to aid them in completing their science fair project. The site includes advice and help and a great Science Fair Guide.

Free photographs and graphics for educators.

The ENC provides K-12 teachers with a central source for information for mathematics and science curriculum materials and much more.

A guide to engineering for high school girls.  Dream jobs and inspiring women.  There are sections for parents and counselors.

Engineering, Go for it! Has many interactives, a digital magazine, flash cards, kid's books, tools for teachers, lesson plans by grade level and career path and scholarship information. Engineering and math activities for all grade levels.  

A web site for K-12 teachers and students, designed to help find the best sources of data on the Internet about the environment and the natural world, including international and U.S. databases, research papers, lesson plans and activities.

The EPA education section is rich with downloadable curricula with grade level lesson plans, activities for schools, kids, students and teens.

Exploring Weather is a comprehensive website that explores all of the different types of weather from hurricanes to winter storms with complete information tables, vocabulary and extensive explanation and pictures. It also includes forecasting and optical illusions.