Exercise Sets
Your assigned vocabulary sets
Butomus — a wild flower widely known as the Flowering Rush
BUTOMI
Butomi
Learn words faster. Remember them longer.
Most students forget 80% of new vocabulary within a week. Butomi students remember 90% — by reviewing the right words at the moment your brain is about to forget them.
Spaced repetition SAT diagnostic SAT-style practice Essay coach
90%retention after 7 days
4,943words across 6 levels
0cards reviewed too early or too late
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Butomi: Flower your knowledge, ad infinitum
THREE PILLARS
Words you actually keep, a test that places you exactly, and an essay coach that types alongside you.
Built around the forgetting curve. Tuned by Korean academies. Powered by every dopamine hit a serious student needs to show up tomorrow.
MEMORY · VISION 1
Words stay in your brain, not just on the page.
The forgetting curve, solved. Flashcards categorize what you don't know. Learn schedules each word's next review at the moment your brain is about to forget it.
Without Butomi · 20%
With Butomi · 90%
Reviews triggered at the exact moment your brain is about to forget.
01
Sort.
Swipe through flashcards — words you know go right, words you don't go left and feed your personal Difficult Words deck.
obscure
quaint
vivid
← →02
Schedule.
Each card gets its next appearance timed to the science (FSRS), not the calendar. Reviews show up the moment your brain is about to forget.
1d
3d
7d
14d
30d
03
Lock in.
Six consecutive correct graduates a word out of your active deck. 90% retention after 7 days vs the 20% baseline you'd get from cramming.
Mastered
ASSESSMENT · VISION 2
Find your level. Practice the SAT.
A short cold-read places you on the level ladder using Paul Nation's VST methodology. SAT-style fill-in-the-blank exercises drill the same word pools you're learning.
"The committee will _____ the proposal next week."
Beginner Elementary Intermediate Upper Advanced Expert
0
05K10K15K20K25K28K
Recommended start Level 3 — Intermediate
01
Place.
A 5-minute Vocabulary Size Test estimates your active vocabulary and assigns one of six levels — Beginner through Expert.
You
02
Practice.
SAT-style fill-in-the-blank questions test the words you've been studying inside real sentence context — the way they actually appear on the test.
She remained _____ in the storm.
A. afraid B. stoic C. cold D. wet
03
Re-test.
Take the diagnostic again any time to watch your vocabulary size climb. Each retake is a fresh sample, not a re-run of the same words.
ESSAY COACH · VISION 3
Sentence-level feedback while you write.
Write essays with vocab, grammar, and rhetorical hints appearing per sentence. Rubric scoring tailored to your grade level. Full revision history with side-by-side diff.
The result was a bad consequence for the project.
Vocab adj
bad → detrimental
Stronger academic register; signals real harm rather than mild dislike.
Rubric · grade 11 — / 20
Ideas—
Organization—
Language—
Style—
01
Write.
Three modes — Free, Assigned, Open — with anti-paste lockdown for honest practice and a sticky toolbar that always shows your save state.
02
Polish.
Live Language tab suggests vocab and grammar upgrades per sentence. Hints tab gives high-level structural analysis as your essay grows.
...the result was a bad consequence...
Vocab bad → detrimental
03
Score.
Rubric tab grades each criterion 1–5 with feedback tailored to your grade level. Revision history lets you compare any two drafts side by side.
Ideas5
Org4
Lang5
Style4
Plus daily streak rings, a personal Difficult Words deck that auto-builds, smart compose for words you've learned, and a mascot who celebrates every word you nail. Show up. Get the hit.
ABOUT
Built by a Daechi instructor.
Justin spent years teaching English in Daechi academies — the most competitive test prep district in Korea, where parents pay top dollar and students fight for every percentile point. The same pattern, every semester: students would memorize 50 words for Friday's quiz and forget 80% by Wednesday.
Butomi is the system he wished he had on day one. Spaced repetition tuned to the exact moments the brain is about to forget. SAT-style practice on the same word pools you're learning. An essay coach that points out which "bad" should be "detrimental" before you submit.
Built with Daechi academies, for serious students.
A note on private instruction
A small number of students work with Justin directly each season. SAT prep calibrated daily to where you actually miss. Essays revised line by line, never templated. Past students typically gain 200+ SAT points in three months.
Inquiries open monthly. Cohorts are small.
Apply for considerationGENERAL CONTACT justin@butomi.com
