Other
Space Science Institute: Alien Earths: Search for Life
How do you recognize life on another planet? What tests do scientists use to determine if something is a life form when they are many light years away from being able to observe it directly? Try your hand at interactives to create a...
Smithsonian Institution
Smithsonian Learning Lab: The Universe, an Introduction
Start with the questions all students ask: How big is the universe, how far away are the planets and stars, how did they form and when, how do they move and why? Build on their natural curiosity. The Smithsonian, in cooperation with...
Math Planet
Math Planet: Pre Algebra: Ratios and Percent: Rates and Ratios
Explains what rates and ratios are and how they are different. Shows how to solve an example problem about ratios and presents a video demonstrating how to show a ratio as a fraction or a decimal. [1:52]
University of Texas at Austin
The University of Texas Mc Donald Observatory: Solar System Science
Each student becomes the "ambassador" for a planet and prepares by researching their planet, then meets with other ambassadors to form new mini-solar systems.
NASA
Astronomical Society of the Pacific: Telescope Treasure Hunt
This hands-on astronomy activity lets learners hunt for different objects in the night sky that contribute to stellar and planetary formation, using a Treasure List. They will learn how stars and their planets form and will find objects...