LEARNING OBSERVATORY · BUILT IN PUBLIC
One builder's study bench — memory, math, language, and the science of how we learn.
This isn't a course. It's one person turning cognition, math, and language into things you can actually poke — flashcards, memory tests, note frameworks, and explanations you write yourself.
Some of it works. Some of it is a prototype. None of it replaces a teacher. That's the point.
No sign-up, no navigation. Each runs entirely on this page — tap the ? on a tile to learn what it is.
No-fibs: a flip-card toy — real recall needs spaced repetition over days, not one pass.
No-fibs: a quick arithmetic drill — fluency ≠ understanding; this only measures speed on small numbers.
No-fibs: 4 traced words — etymology is scholarly and sometimes contested; check a dictionary.
No-fibs: a self-recorded digit-span toy — not a clinical working-memory test or a diagnosis.
CUES
NOTES
SUMMARY (2-3 sentences)
No-fibs: the Cornell layout itself — a note structure, not a study guarantee; you still have to review it.
No-fibs: a fixed 1/3/7/14-day toy schedule — real spaced repetition adapts to your history, not these fixed steps.
No-fibs: a self-test prompt — the model answer is one explanation, not the only right one. Feynman technique needs a real human listener.
No-fibs: a matching drill — recognition isn't recall; matching here doesn't mean you've learned the topic.
No-fibs: trial division by small primes — works for these ranges; huge numbers need smarter algorithms.
Cognition as study tools
Memory span, Stroop, reaction time. Self-recorded practice — not diagnoses, not medical measurement.
Math & number theory
Prime factorization, Fermi estimates, mental math. Toys and drills, not a curriculum or a grade.
Language & linguistics
Etymology, structure, vocabulary. LLM-assisted translation — not executed or compiled here.
Note-taking frameworks
Cornell notes, Feynman, concept maps. Structures that only help if you actually review them.
Spaced repetition
Schedule review over time. A toy scheduler with fixed steps — real SR adapts to your history.
An honest changelog
What actually shipped, written by the builder. Not marketing, not a syllabus.
These are descriptions, not links — this page is a closed showcase. The full app lives behind a login.