Pioneers like Sal Khan are already showing how effective online tools can be.

像开拓者萨尔可汗已经展示了在线工具的高效率。

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From my vantage point, Sal Khan lit the match igniting the current blaze of innovation.

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Sal Khan actually built tools to help his cousin in New Orleans with her math homework.

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So, we asked Sal Khan to respond to the comment on camera.

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