FSRS Wiki (Free Spaced Repetition Scheduler)
by Jarrett Ye and the Open Spaced Repetition contributors · Open Spaced Repetition
Wiki for the Free Spaced Repetition Scheduler, the algorithm that replaced SM-2 as Anki's default. Documents the difficulty-stability-retrievability memory model, parameter optimisation by machine learning, the evaluation metric, and benchmarks against competing schedulers. The deepest technical layer of the topic, distinct from the Anki manual, which documents FSRS configuration but not the memory model or benchmark methodology.
More resources on Spaced Repetition & Anki
Make It Stick: The Science of Successful Learning
Three researchers summarise the experimental evidence on how durable learning happens: retrieval practice beats rereading, spaced and interleaved sessions beat massed ones, and effortful study predicts later recall. Directly applicable to practising and memorising music.
Improving Students' Learning With Effective Learning Techniques
Peer-reviewed monograph assessing ten study techniques against criteria including learning conditions, materials, and student characteristics. Distributed practice and practice testing receive the only high-utility ratings; rereading, highlighting and summarisation rate low. Fifty-eight pages with full citations.
Augmenting Long-term Memory
Essay documenting several years of Anki use, including a worked example of reading the AlphaGo paper card by card. Covers card-writing patterns, common failure modes such as orphan cards, and the argument that memory underpins understanding. A serious researcher reporting first-hand practice, not an influencer.
Effective learning: Twenty rules of formulating knowledge
Twenty principles for phrasing material before entering it into a spaced-repetition system, written in 1999 by the creator of SuperMemo. Covers the minimum information principle, cloze deletion, avoiding sets and enumerations, imagery, and personalising items. Prescriptive rules derived from Wozniak's own long-run repetition data, each with worked good/bad examples. Reading this once removes the need for any downstream 'how to make good flashcards' listicle.
Anki Manual
Official documentation for the Anki desktop client, maintained by its developers. Covers installation, note types and card templates, the scheduler, deck options including FSRS configuration, syncing, add-ons, importing shared decks, and troubleshooting. The single canonical setup/workflow reference, making every 'how I set up Anki' video redundant.