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I feel the need to point out that when I submitted a link to khan academy, no one up-voted it. Why is this?

I did not see it that time? May also be the title given to the post. Humans are fickle. ( will up vote you now ;)

I'm guessing it was the word 'youtube' combined with 'educate'. (Youtube doesn't have much, uh, 'patina' for some of us.)