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this might be related to "random practice" (contrasted with "blocked practice")

this might also be called "varied practice"

"By contrast, in random practice, motor learners work on a number of different skills in combination with each other, randomly working trials and patterns of one and then the next and the next, with each trial interleaved on the previous one." [1]

"blocked practice" and "random practice" seem to be used a lot in a sports/motor skills context, whereas I've seen "interleaving" in other contexts.

A possible difference between interleaving and random practice is that the latter enforces randomness, whereas the former might make the pattern of review predictable (or is intended to be general so as to include enforced randomness as a special case).

"Why might interleaving enhance long-term retention and transfer? One theory suggests that having to resolve the interference among the different things under study forces learners to notice similarities and differences among them, resulting in the encoding of higher-order representations, which then foster both retention and transfer. Another explanation suggests that interleaving forces learners to reload memories: If required to do A, then B, then C, and then A again, for example, the memory for how to do A must be reloaded a second time, whereas doing A and then A again does not involve the same kind of reloading. Such repeated reloadings are presumed to foster learning and transfer to the reloading that will be required when that knowledge or skill is needed at a later time." (Bjork and Bjork)