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00 Learning doc skill

One free Claude skill · Learning

Free Claude learning doc skill Learn with AI. Get tested without it.

Tell it what you want to learn, your minutes a day and your deadline. It builds one file that teaches in plain words, tests you as you go and brings each idea back before you forget it.

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One skill · eight guides · three scripts · free, MIT License

no app. no account. one file.

Why the Moon changes shape Lesson 1 · 12 min

Where moonlight comes from

By the end of this lesson you can

  • Explain where the Moon’s light comes from.
  • Explain why one half of the Moon is always lit.

Guess first

You have not learned this yet. Guess anyway: a wrong guess followed by the answer helps you remember.

Where does the Moon’s light come from?

  1. The Moon glows by itself, like a lamp.
  2. Sunlight bounces off the Moon and reaches our eyes.
  3. Light from cities on Earth lights it up.
  4. Starlight lights it up.

why-the-moon-changes-shape-learning-doc.html

Lesson 1 of the example course in the zip, printed as a workbook. Words as written; the circle is mine.

01 Once isn’t learning

Why every card comes back

Once isn’t learning.

In July I had about two weeks to learn security and databases for a hiring process. AI read 24 interview reports and built me a study folder. On day eight, the CEO ran the hardest round. I couldn’t explain things I had read that week.

My question bank · PostgreSQL

VACUUM vs VACUUM FULL in PostgreSQL?

Answer folded under

seen once.

One topic · CSP

  1. Week 1 Studied it.
  2. Day 8 Fumbled it.
  3. Day 10 Drilled it. The CTO round held.
  4. Six weeks later Tested myself.

Gone.

“VACUUM was in my question bank, starred as a real interview question. I had seen it once. Once isn’t learning.”

July 2026. The company and every person stay unnamed. The day after the CTO round, the CEO said no.

What the research says

Receipt · Learning a new library with AIReceipt · Learning with AI 29 Jan 2026

50% vs 67%

52 mostly junior engineers learned a new Python library, then took a quiz without AI. Those who learned with AI averaged 50%; by hand, 67%. They saved about two minutes, not significant.

Source Anthropic, Shen and Tamkin, “How AI assistance impacts the formation of coding skills” anthropic.com

Receipt · Recall under stressReceipt · Under stress 25 Nov 2016

11 vs 7 items

Under stress, people who had tested themselves recalled about 11 of 30 items. People who had reread them recalled about 7.

Source Smith, Floerke and Thomas, Science, via Tufts University sciencedaily.com

reading it felt like learning.
recall is what stays.

02 Your week

scripts/plan.py · capacity

It sizes the course to your week.

It asks your minutes a day, your study days and your deadline. Before it writes a lesson, it works out how many fit, and tells you when your topic doesn’t.

A3 · your plan, sized Marker on paper · the skill’s own math

3. Minutes a day?
min
4. Days a week?
days
5. Deadline, and start date?
weeks, from today

It also asks your goal, what you know already, what makes learning click, your job or hobby for the examples, your materials, and whether to research online. Say “go” and it uses its defaults.

$ python3 plan.py capacity --minutes 20 --days 5 --start 2026-11-02 --deadline 2026-11-30

Study sessions
20
Lessons that fit
15
Minutes a lesson
15
  • Each session: 5 min of review cards, then 15 min new
  • Words a lesson: 1,070 to 1,390
  • Practice and catch-up: 3 · final check and light review: 2
  • Total: 6.7 hours

1 Learn P Practice and catch up F Final check R Light review

a catch-up every four. real weeks slip.

20 study sessions, Mon 2 Nov 2026 to Fri 27 Nov 2026: 15 to learn, 3 to practise and catch up, a final check and a light review.

The skill’s sizing rule, scripts/plan.py, running in your browser: the same answers as the script on 210 test cases. The real plan dates every lesson it writes. Shown: 20 minutes, Monday to Friday, from 2 Nov 2026 with a deadline four weeks later.

03 One lesson

From the example course in the zip

It asks before it tells.

Every lesson opens with a question you can’t answer yet. A wrong guess, then the answer, helps you remember. Try lesson 1 of the example course that ships in the zip.

Why each part is there

  1. 01 Guess first Trying to answer before you learn it improves memory of the answer, even when the guess is wrong.
  2. 02 One idea, one example Working memory holds about four new things. So one idea at a time, with an example from your world.
  3. 03 Check yourself Pulling it out of memory beats reading it again. Wrong answers explain why.
  4. 04 Review cards Get a card right and it comes back after 1, 2, 4, 8, 16, 32, then 64 days. Miss it and it comes back tomorrow.

go on. guess.

Why the Moon changes shape

Lesson 1 · Where moonlight comes from

Guess first You have not learned this yet. Guess anyway: a wrong guess followed by the answer helps you remember. Where does the Moon’s light come from?

The Moon is a mirror, not a lamp

The Moon is a huge ball of grey rock. It makes no light at all. We see it for one reason: sunlight hits it and bounces back toward Earth. In other words, the Moon reflects sunlight.

Example

Think of a bike reflector at night. It seems to glow when a car passes. But it only shines while the car’s headlights hit it. The Moon works the same way, with the Sun as the headlights.

Check yourself It is night where you live, and the Sun has set. Why can you still see the Moon?

Key idea

At any moment, the Sun lights exactly one half of the Moon. Always half. Never more, never less.

Your review cards

These join your review deck when you mark this lesson as done. Test yourself now: read the front, answer in your head, then flip.

Card 1 of 4 Where does the Moon’s light come from?

From the Sun. Sunlight bounces off the Moon to our eyes. The Moon makes no light of its own.

Lesson 1 of the example course, words as written. In the real doc your answers and cards are saved in your browser, offline.

04 The rules

What it refuses to do

Five things it won’t do.

Each one feels like studying and works worse, or makes a course look bigger than it is. The skill would rather hand you a shorter one.

Rules · they hold even when you ask

From SKILL.md

  1. 01 Never

    Sort you into a learning style.

    Teaching to a style didn’t help in the studies built to test it. It asks what makes learning click, gives you more of that, and still tests you.

  2. 02 Never

    Make you reread.

    Rereading and highlighting do little on their own. Every lesson makes you pull it out of memory instead.

  3. 03 Never

    Cram it in.

    When your topic doesn’t fit your time, it says so with numbers, and cuts to what your goal needs.

  4. 04 Never

    Teach what it can’t trace.

    Only what a source it read says, or knowledge that doesn’t change. Facts that change carry a month and year.

  5. 05 Never

    Sell you something.

    Your doc carries a favicon, one small logo and one line: “Made with the free learning doc skill from Inspected by Marko.” Nothing in the lessons.

that’s the whole ad.

Why it refuses

Receipt · Learning styles 2008

“There is no adequate evidence base to justify incorporating learning-styles assessments into general educational practice.”

Source Pashler, McDaniel, Rohrer and Bjork, Psychological Science in the Public Interest pubmed.ncbi.nlm.nih.gov

Receipt · Feeling of learning 2019

“Students in the active classroom learn more, but they feel like they learn less.”

Source Deslauriers and colleagues, Proceedings of the National Academy of Sciences pnas.org

The doc says it too, on its start page

Review cards come back after a day, then after longer and longer gaps. Remembering after a gap feels harder than rereading. That effort is what makes it last.

05 Get the skill

Free · By email

Want to learn it and keep it?

One skill, eight guides, three scripts and an example course, in one zip. Claude builds the doc; you study it offline, on any device. Read every file before you run it. I would.

  • learning-doc-skill.zip
  • inspected-by-m-learning-docs/
  • LICENSE MIT, word for word
  • NOTICE.md fonts and other notices
  • README.md how to install it
  • SKILL.md the method, step by step
  • references/ 8 guides
  • intake.md what it asks you first
  • research-and-sources.md how it reads and checks
  • study-plan.md how it fits your time
  • doc-components.md the parts of a lesson
  • writing-plain-language.md how it keeps it simple
  • learning-science.md the research, rated
  • questions-and-cards.md how it tests you
  • bibliography.md every study it rests on
  • scripts/ Python 3
  • plan.py fits lessons to your time
  • build_doc.py checks and builds the file
  • readability.py flags long sentences
  • assets/ page engine, fonts, example
Works in
Claude Code, or the Claude app with code execution on. Web search on if it should research the topic.
Needs
Python 3 for the scripts. Nothing else.
Yours to
Copy, change and share, under the MIT License.

Get the learning skill.

  • Learning doc skill · builds a course that tests you as you go

Free to copy, change and share, under the MIT License. It comes with no warranty: read a skill before you run it.

How I use your email

Box not ticked? You get the skill and nothing else, and your address is deleted after 30 days.

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