This topic is really a must know for everybody in education.
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Quick summary
Increasing interval retrieval practice requires:
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Looking at the forgetting curves in the graph above - we suggest that learners who forget:
within 2 days, within 3 days and within a week are ideal for timely practice - we call these learners “our cohort”, as they most benefit from timely practice,
between 1 and 4 weeks although these learners will benefit from timely practice, they may gain almost as much from whole class retrieval practice,
over 4 weeks - these are typically high attaining learners, who homework and end-of-unit tests etc works well for - although it has to be said that . However, most “top sets” in year 7 and 8 will contain a few learners who will benefit from timely practice and without a retrieval practice program may well be in middle or even lower middle sets by year 10 and 11.
(2) after success - increase the interval between one practice and the next
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the app updates the depth of learning - the duration which the app knows the learner can independently recall and accurately apply the learning of the lesson for
the app calculates the earliest date the layer should be asked again - to stretch the ready date - this is the duration of wait which will stretch the learner’s recall-ability of the learning of the layer
the app calculates the latest date the layer should be asked again - to ensure the learning is not forgotten- the overdue date - after this duration of wait we think the learner is in danger of forgetting
Each question is from the layer, and we assume that success on any question indicates some level of mastery on all similar questions within the layer.
With successful retrieval practice we are improving the recall of the faster forgetter (e.g forgets within 2 days), with a few retrieval practice questions (e.g. 5 retrieval practice questions) until they can remember as the best rememberers do (e.g. for over 4 weeks)
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Over time, the fastest forgetter with retrieval practice can remember for longer than the best rememberer without retrieval practice. After a few more retrieval practice questions the interval (the wait between one practice and the next) will become several years. Often layers no longer need to be practised, because harder layers now cover the same learning.
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correct - shown by a ✔︎ and
feedback - shown by a * assessment outcomes:
Feedback |
required |
due to poorly spaced lessons |
/learner absence | Minimal feedback requirement |
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Despite well spaced lessons some feedback is needed | The teacher is very persistent with feedback - on this occasion it pays off. |
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More about questions that need feedback after they are asked very late
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