May 5, 2026 — The author explains that they use Anki, a flashcard application that incorporates spaced repetition, to review mathematical concepts and other subjects after extended periods of disuse.

The writer notes that flashcards are often viewed as tools for rote memorization, a perception prevalent in science, technology, engineering and mathematics (STEM) communities. Research on spaced repetition indicates that reviewing material at increasing intervals can improve long‑term retention.

The author creates most cards by hand, focusing on concepts, intuition and "A‑ha" moments rather than textbook definitions. Deck organization includes a dedicated set for problems previously solved incorrectly, allowing scheduled practice. Review sessions typically last one to thirty minutes per day, depending on recent card additions.

The software interface appears dated, the HTML editor is complex, and the file format is not publicly documented, which complicates data portability. Alternative plain‑text spaced‑repetition tools have not matched Anki’s flexibility.

Understanding the material before creating or using flashcards is emphasized; the author states that memorization without comprehension is ineffective. Cards are used after mastery to maintain familiarity.

The author also links flashcard creation with a broader note‑taking practice, citing external sources for further reading. While empirical evidence specific to Anki in STEM fields is limited, the author finds the approach valuable for preserving knowledge over extended intervals.