Classroom Activities: Our collection of classroom activities includes student activity sheets, science background information, national education standards, and more. All are supplied as PDFs.

Graphic Organizers: Our complete collection of T-charts and Venn diagrams that compare and contrast various celestial phenomena.

Myths vs. realities: Our collection of common misconceptions about space, accompanied by the facts that dispel the myths.

Online explorations: All of our fun, interactive online activities.

Pictures and facts: Two collections of resources: Lithographs (downloadable PDFs of some of Hubble's greatest hits) and Fast Facts (Hubble photos of celestial objects accompanied by tables of salient facts).

Q&As: Our collection of commonly asked questions about astronomy and the Hubble Space Telescope.

Resources with Educator Guides: All of our resources that have detailed Educator Guides, written by the teachers who developed the activities. These include the "Online explorations."

Science content reading materials: All resources that represent a "reading for comprehension" activity.

Star Witness stories: News stories that bring you scoops from the Hubble Space Telescope's lengthy list of discoveries.