> I don't think that biggest improvements will come from better spaced repetition algorithms Exactly that, specially for language learning. The stated goal of

> I don't think that biggest improvements will come from better spaced repetition algorithms Exactly that, specially for language learning. The stated goal of hitting a target probability is pointless IMO. Language acquisition is not about memorizing words, but progressive familiarization (eg via retrieval practice). You have to expose yourself to massive amounts of language, create your own cards fast, review them faster, move on even if you "fail", don't do too many repetitions (6-8 should be enough for >95% of cards) The most important aspect of an SRS algorithm is to be practical: sensible choices, equally spaced out among them, that allow you to decrease / maintain / increase intervals without ever punishing you for failing.