# study.cards

> Simulate review intervals, test your memory, build vocabulary cards, and clean overloaded study decks.

Supported locales: en, es, fr, de, pt, it, nl, pl, ja, ko, zh, hi.

## Tools
- [SM-2 review simulator](https://study.cards/tools/spaced-repetition-scheduler/): See how Again, Hard, Good and Easy ratings change intervals and ease.
- [Active recall self-tester](https://study.cards/tools/active-recall-tester/): Reveal answers, grade each attempt and export a missed-card drill.
- [Vocabulary card maker](https://study.cards/tools/vocabulary-card-maker/): Build forward and reverse cards with examples and word roots.
- [Formula reference cards](https://study.cards/tools/formula-card-sheet/): Print equations, variable definitions, units and conditions as reference cards.
- [Deck cleaner and prompt auditor](https://study.cards/tools/deck-deduplicator/): Merge identical cards, preserve conflicting answers and flag long answers.

## Guides
- [Interleaved Practice: Mix Similar Problems in Your Study Cards](https://study.cards/blog/interleaved-practice-with-study-cards/): Build a small mixed practice set that tests which method to choose. Combine flashcards with worked problems, feedback and a later transfer check.
- [Use active recall to study](https://study.cards/blog/active-recall-study-method/): Active recall means attempting to produce an answer before consulting the material.
- [Understand SM-2 review intervals](https://study.cards/blog/sm2-spaced-repetition-intervals/): SM-2 is a scheduling model that updates review intervals using answer quality and an ease factor.
- [Make language vocabulary cards](https://study.cards/blog/language-vocabulary-study-cards/): A vocabulary card can test recognition, production, usage or grammatical form.
- [Make STEM formula cards](https://study.cards/blog/stem-formula-study-cards/): A formula reference card should preserve the meaning and limits of an equation.
- [Clean and refactor study decks](https://study.cards/blog/cleaning-and-refactoring-study-decks/): A deck accumulates maintenance problems as your understanding changes.
- [Grade recall confidence honestly](https://study.cards/blog/self-testing-confidence-grading/): Confidence grades are useful only when they describe the attempt made before the answer appeared.
- [Recover from a review backlog](https://study.cards/blog/fixing-flashcard-review-backlogs/): A backlog is a workload problem that needs a bounded recovery plan.
- [Build medical and science recall cards](https://study.cards/blog/medical-and-science-recall-cards/): Science cards need enough context to prevent a concise statement from becoming misleading.