https://wikipedia.org/wiki/Bloom's_2_sigma_problem the average student tutored o... | Hacker News

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hyperpallium2 on Nov 19, 2020 | parent | context | favorite | on: The Most Common Errors in Undergraduate Mathematic...

https://wikipedia.org/wiki/Bloom's_2_sigma_problem

  the average student tutored one-to-one using mastery learning techniques performed two standard deviations better

A tutor can notice gaps. You can't.

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