you come, they will build it—turning AI into IA is only going to get more efficient every year. “In the old days someone would publish a calculus textbook and get no data and no feedback on what is working for people and what is not,” explained Sal Khan. So they spent the next five years just changing page numbers. Today, he said, Khan Academy can put up a set of calculus tutorials and see within hours which ones are the most effective in helping students come up with the right answers, iterate immediately, and start scaling the best tutorials globally within a few more hours. The ability to
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