Open Education Resources (OER): Digital libraries of textbooks, videos, online courses, lecture slides, and more.
- ASTRO 801 Planets, Stars, Galaxies, and the Universe (PennState): Provide science educators with a strong foundation in astronomy, allowing them to critically evaluate the evidence for the most recent advances in our understanding of the Solar System, our Galaxy, and the Universe.
- LibreTexts - Astronomy
- Download Library: A collection of Chemistry books from the LibreTexts library that are ready to download, print, or remix online.
- MERLOT Astronomy
- OER Commons - Astronomy
- National Science Digital Library: Online education resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines - both formal and informal, institutional and individual, in local, state, national, and international educational settings.
- OpenStax - Science: A large library of free, high-quality, peer-reviewed, openly licensed textbooks for high school and college students.
- Teach Astronomy: An astronomy learning tool, intended either as a supplement for classroom instruction or for formal learners wanting to know more about the subject.
