146b. Lessons from EdTech - The 90% Rule

In the second part of this two-part episode about lessons learned from my time working in the education technology sector, I wanted to share a very significant quantitative finding to improve learning: what I call the "90% rule". Desirable difficulties is a concept that many know about and try to apply to teaching situations, but there is a question of how difficult one should make things. Surely there is a level at which things are too difficult? In which case, what is the perfect level of difficulty that we should aim for? The secret is this 90% number. Enjoy the episode. *** REFERENCES Eglington, L.G., Pavlik Jr, P.I. Optimizing practice scheduling requires quantitative tracking of individual item performance. npj Sci. Learn. 5 , 15 (2020). See also the SuperMemo Guru wiki: . SUPPORT If you would like to support Education Bookcast and join the community forum, you can do so at

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146b. Lessons from EdTech - The 90% Rule is an episode from Education Bookcast by Stanislaw Pstrokonski.

This episode is 31:14 long.

This episode was published on May 7, 2023.

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