Khan Academy

Khan Academy provides online courses from primary school through early undergraduate levels. Videos, challenges, and assessments help you learn the subject at your own pace. Parents, teachers, and coaches can track a student's progress.

Khan Academy works with the College Board to help American students prepare for the SAT college entrance exams. 

Beyond the physics and mathematics courses, specifically space-related courses include:

  • Scale of the universe
  • Stars, black holes and galaxies
  • Earth geological and climatic history
  • Life on earth and in the universe