See also:
You've got to be cool to make igneous rocks - Lesson plan for grades 7-9 (M)
How Stuff Works - Comprehensive resource site from the author of the book with the same name. Find the answer to how anything works! (Y, M, O, T)
Science and Our Food Supply - Investigating Food Safety From Farm to Table Free curriculum kit for your Middle Level or your High School Classroom! (T)
Smithsonian Education - A gateway to Smithsonian Educational Resources. For educators, families and students. (Y, M, O, T)
Erosion Mini-Unit (Homeschooler's Account) - (Y)
Eyes of Nye - "For six seasons, millions of children and young people from elementary through high school, along with their parents and teachers, came to understand, appreciate, and enjoy the exploration of science through the Bill Nye the Science Guy Series. Now Bill (Y, M, O, T)
Google Earth - Want to know more about a specific location? Dive right in -- Google Earth combines satellite imagery, maps and the power of Google Search to put the world's geographic information at your fingertips. (Y, M, O, T)
Science in a bag Lesson: Light and Crystals - To use hydro-gel crystals in a hands-on activity to study light refraction through two media. Also, to stimulate critical thinking. Upper Elementary and Middle School Age Children (M)
Mineral Information Institute Free Resources - Five lessons are free online and you have the option to order posters for about $2 each to complement the lessons. The following lessons are available: A Study of the Earth, Everything We Have Comes from Natural Resources, Everyday Uses of Minerals, Creat (Y, M, O, T)
Science NetLinks:The Four Seasons - To understand that it is the tilt of earth’s axis that causes the seasons. Grades 6-8 (M)
Individual Lesson Units and Graphics - From Mineral Information Institute - Dig a Little Deeper - For Teachers Only. Free K-12 Earth Science Lesson Plans (Y, M, O, T)
A Science Odyssey: People and Discoveries: - A databank consisting of 120 entries about 20th century scientists and their stories. (M O)
HippoCampus - HippoCampus provides free, multi-media content in many subjects, including Algebra, Physics, Calculus, Environmental Science, U.S. History and more. I found it to be a bit awkward to navigate around entire books on the site, but there is a wealth of information online at no cost. (Y, M, O, T)
A science lesson on Trees - The students will be asked what they know about trees. They will view a tree cutting and guess how old it is. After making predictions they will count the rings to verify the age of the tree.Grade Level - 3rd (Y)
Rainforest Trees - The Great Kapok Tree Gr K-1 (Y)
Layers of the Rainforest - This lesson teaches children the 4 layers of the rainforest. Grades K-1 (Y)
Arbor Day Lessons and Teacher Resources - (Y, M, O, T)
Earth Day Lessons and Teacher Resources - (Y, M, O, T)
The Great Globe Gallery on the World Wide Web - "Get the whole world in your hands with globes that speak your language." (Y, M, O, T)