Wednesday, 7th December 2011
How to get black hole badges on Khan Academy
I finally worked out how to get the black hole badges on Khan Academy. The main reason (other than hoping I was close) was that I read on a developer's blog that only one person had ever got a black hole badge. Unfortunately, on searching Google I found various claims that the Telsa badge is for reaching 10 million points. However, the same people claim that the Atlas badge is for completing 150 exercises, and I've already completed 150 exercises.
All these claims (which were made many months ago now, before there were 150 exercises) seem to be based on the old code, which is available here. It's all in Python, which I'm pleased about. After a bit more searching, I found a more up-to-date version, which shows that for:
- Atlas Badge - you need to complete 500 exercises (even though there are currently only 252 298. I guess this will change to be complete all mathematics exercises.)
- Tesla Badge - you need 10 million energy points (as before)
I still don't see how this is possible - watching all the videos currently available would give you just over 2 million points. You'd need to watch 13 000 videos to get 10 million point. You can get more by doing exercises, but I've completed all the exercises and got around 1.5 million points that way. At this rate it will take me another four years, assuming a constant flow of new videos and exercises.
I guess they're just there as an aspiration. Maybe one day...
Comments
Do you mean "Tesla badges"? If so, a Serbian-American genius is (figuratively) spinning in his grave right now, even if you spelt it correctly...
I am annoyed, I had also read that one of the Black Hole badges comes at 150 proficiencies, then in another post that it happens at 180. I now have 181 proficiencies and a million points and still no black hole badges. Now I feel very cheated and disheartened and don't want to do any more.... :-(
I guess the whole point of Black Hole badges is that they are very difficult to get. I suspect they are saving the Atlas badge so it can be given when you complete all the mathematics exercises. But first they have to make all the exercises. The Telsa badge is achievable - it will just take a few years.
It would be nice if there were more higher level badges though while we work towards the Black Hole badges.
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