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  • - Hi teachers, this is Sal Khan here from Khan Academy

  • and welcome to Course Mastery.

  • So back in 1984, famous education researcher

  • Benjamin Bloom published the famous two-sigma study

  • where he showed that a student who works

  • in a mastery learning framework with a tutor,

  • one-on-one can operate two standard deviations better.

  • So the student who is operating in the 50th percentile

  • can operate well into the 90th percentile,

  • 95th, 96th percentile.

  • You fast forward to today, there have been

  • over 200 studies that have backed up his claims.

  • On top of that, you as an educator,

  • know that your students enter your class

  • at all different levels.

  • You also know that differentiation has always been

  • considered a best practice in education.

  • The hard part, however, is how do you do that

  • with 25, 30, 35 kids in the classroom?

  • All of us at Khan Academy, we firmly believe

  • that if we have to pick between an amazing teacher

  • and an amazing technology, we'd pick you every time,

  • the amazing teacher.

  • Luckily, we don't have to make that trade-off,

  • and so we're think about how can we empower you,

  • an amazing teacher, with as powerful technology as possible?

  • And that's what Course Mastery is.

  • It's a way for you to set mastery goals

  • for your students, and these goals are fairly large goals,

  • so that they'd be appropriate for over a term

  • or over a school year, and you set it once

  • and then you can feel confident that over the rest

  • of the year or the rest of the term,

  • your students have things to work on

  • the are appropriate for them.

  • They'll be able to learn at their own time and pace,

  • master concepts at their own time and pace,

  • consistent with Benjamin Bloom's work,

  • and remediate their gaps as necessary.

  • And multiple studies have shown that when students

  • on Khan Academy are able to engage in mastery learning,

  • learn at their own time and pace,

  • for even 30 minutes or more per week.

  • So say 45 minutes a week, or one class period a week,

  • they're able to accelerate their learning

  • as measured by standardized benchmark exams

  • by 20 or 30%.

- Hi teachers, this is Sal Khan here from Khan Academy

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