Bart

1. Общност
2. Content Requests and Feedback
3. (1) Allow one to finish an old course (2) Issue a certificate after successfully finishing a course

This request has been made earlier by other users, not merely by you an me. The response of Khan then was to post a screenshot of your progress on LinkedIn. To me, this sounded like bad joke, parti...

1. Общност
2. Content Requests and Feedback
3. (1) Allow one to finish an old course (2) Issue a certificate after successfully finishing a course

Ok, thanks, I hope your input will be taken into serious consideration.

1. Общност
2. News and Updates from Khan Academy
3. Content Update: 5 newly complete science courses!

I concur with finmgammell. I pretty much lost all the Mastery points I gained in the High-school physics course. I noticed that in the Physics library the Mastery points gained from practice assign...

1. Общност
2. News and Updates from Khan Academy
3. Content Update: New AP Chemistry videos and exercises, plus new in-progress science courses!

I gained a lot of mastery points in the old High-school physics curriculum, and that is now gone. The video's I watched are still listed as being watched, but the quizzes and unit tests are all set...