HippoCampus
All guides

Memory techniques — mnemonics and the Major System

Turn numbers into words and words into pictures. A practical tour of the mnemonics that pair well with flashcards.

3 min readPublished

Mnemonics and spaced repetition

Spaced repetition schedules when you review. Mnemonics help with what you store on the first pass — vivid links, stories, and sound-alike hooks that make arbitrary facts easier to recall.

The two work together: a mnemonic gets you through early reviews; spacing converts that fragile hook into durable knowledge.

Link and story methods

Link method: chain items in a silly narrative. “Moon → cheese → mouse → trap” ties four unrelated words in order.

Story method: embed facts in a single scene. For history dates, place exaggerated images along a familiar route (method of loci). On a flashcard, the question triggers the scene; your spoken answer walks through the facts.

These methods shine when order matters (lists, steps) or when the raw material feels meaningless.

The Major System for numbers

The Major System maps consonant sounds to digits (0–9). You insert vowels freely to build words:

Digit Consonant sounds (examples)
0 s, z
1 t, d
2 n
3 m
4 r
5 l
6 j, ch, sh
7 k, g
8 f, v
9 p, b

Example: 314 might become “meter” (m-t-r). Pair words into images: 3.14 → “my tire” (m-t-r) rolling. For longer numbers, split into chunks and link images.

HippoCampus does not auto-generate Major System images, but you can put your mnemonic in the card’s notes or answer field and still answer in your own words during review.

Peg words and rhymes

Rhyme pegs (one–gun, two–shoe) give you a fixed hook for the first ten numbers. Phonetic pegs extend the idea with a standard word for each digit sound. Use pegs as anchors when you must memorize numbered lists under time pressure.

What to put on a card

Keep the prompt minimal — the question you want to answer in real life. Put mnemonics in supporting fields or your private notes, not in the graded answer text, unless you intend to say them aloud.

For vocabulary, a mnemonic might be an absurd image linking the foreign word to its meaning. For formulas, a sentence where the first letters of each word match the variables.

When mnemonics hurt

Skip mnemonics when understanding beats rote recall — derivations, proofs, or skills you will practice by doing. Over-long stories are hard to maintain; prefer one vivid image over a novel.

If a mnemonic stops working after weeks, replace it during an early review rather than fighting a weak hook through months of spacing.

Pair with honest ratings

Mnemonics can make the first recall feel easy while conceptual knowledge is still shaky. Rate cards honestly after the grader’s feedback so intervals match real strength, not the vividness of your story.

Start learning

Let HippoCampus time the reviews for you

Describe what you want to learn and get a course of cards. Each one comes back just before you would forget it.