CK-12 Foundation
Cassegrain Telescope
How does a telescope magnify images? Learners first watch a tutorial explaining the basic construction of a telescope. Then they interact with a simulation that allows for changes in the location and diameter of the reflecting mirrors....
American Museum of Natural History
Cosmic Connection
Do you see what I see? Individuals view eight images from the Hubble Space Telescope and then determine exactly what is being shown in the images. The pictures range from the rings of Saturn to views of billions of galaxies that take up...
American Museum of Natural History
What Do You Know About Astronomy
Develop an understanding of the universe. Learners answer 10 multiple choice questions about several topics in astronomy. Questions contain information about the age of the universe, gravitational attraction, galaxies, planets and comets...
Curated OER
Coordinates
For this coordinates worksheet, 6th graders solve ten multiple choice questions by using their knowledge of coordinates on a grid. This is an interactive worksheet.
My Schoolhouse
Global Warming or Climate Change?
In this online interactive global warming and climate change worksheet, students respond to 10 multiple choice questions regarding the information included in the provided paragraphs.
Curated OER
Global Warming or Climate Change?
In this online interactive global warming and climate change worksheet, students respond to 10 multiple choice questions regarding the information included in the provided paragraphs.
Curated OER
Phonics for Beginners
In this phonics worksheet, students choose the correct word that represents each picture. Students complete 20 multiple choice problems.
Fourmilab Switzerland
John Walker: Your Sky
You can produce sky maps for any date and time, viewpoint or observing location. See your sky map, horizon view, or track an asteroid or comet on this highly interactive site.