It looks like there aren’t any of these, at least not yet. Some of the other science courses here did not have practice exercises, unit quizzes, and unit tests last year but have them now. So perhaps Cosmology and Astronomy will have them one day, too. Yes, I realize that your need is now, but Khan Academy seems to grow at a slow pace.

Yep. I have wondered that myself. It would be great if there was interactive content in this course too, except videos.

I agree; thank you for posting. From my experience, very few people study / are aware of important Astronomy and Cosmology concepts. It doesn't seem to be very popular, but it most certainly should be as some state standards have been changing to include more of such content.

As some have said already, there aren't any practices on Khan Academy yet for this course, but the videos are quite insightful, and I myself have had a blast (supernova pun) learning from Sal's videos. His extra thought, multiple angles of analysis, and explanations have sparked a passion for me. I am now done with the videos and await more content, of which I am trying to advocate for.

You can find some great videos on certain concepts on youtube, as I have done for my personal study. I would suggest first outlining a course structure and identify what you/your daughter would like to cover. I would suggest starting from the birth of the universe and the previous theories of the universe.

I recently started a free course through Big History Project, which has everything outlined very clearly and is basically 13 billion years of history. https://www.bighistoryproject.com/home

Hope this helps. Let me know if you would like suggestions as to what would be useful/important to study with regards to astronomy and cosmology; I managed to get my own school to have an Earth and Space Science course, so I'd be very happy to help in any way I can!