Teddy Rook Book

Source for teddyrookbook.com: a free, one-person project for learning at any age: a full school day from classic schoolbooks, Greek and Latin, science you can play with, life skills and the trades, business courses, and the great books.

There's nothing to join or buy: no accounts, ads or sign-ups (the repository's name is older than the site's focus). Anyone can use it: families, classes, or people who just like to learn.

What's on the site

Section	What it is
Infographics	One-page visual guides: character maps, book companions, and explainers on faith, science and finance.
Languages	Koine Greek and Latin: the Greek alphabet, sentence drills, a Gospel reader and short readings that explain every word, sentence trees, flashcards, and the study companion to the video Greek and Latin with Jerome. Details below.
Games	Sixteen browser games set in the ancient world, including a daily word puzzle. Details below.
Science Lab	Thirteen simulations built on real physics, chemistry and biology, each with missions and a lesson with the equations, and two deep-dive units: Newton's Laws of Motion (6 chapters) and The Laws of Thermodynamics (5 chapters). Details below.
Music	Piano Basics (9 chapters) and Reading Music (12 chapters, with drills), 20 public-domain piano songs with a synced score-and-keyboard player, a metronome and a two-hand rhythm trainer. Guitar (23 chapters), Ukulele (24) and Banjo (23, three-finger and clawhammer), each beginner to intermediate, with about 40 songs in tab and notation in each instrument's own styles (classical studies, blues and fingerpicking; Hawaiian-style and ragtime ukulele; old-time and bluegrass fiddle tunes), a microphone tuner (/music/tuner/), a chord finder (/music/chords/) and a left-handed view. The fretted kit is in static/music/fret/ (instruments, chord voicings, tab and chord-diagram drawing, plucked-string synthesis, pitch detection); node scripts/music/test-fret.js tests it. The kit in static/music/kit/ (synthesized piano, keyboard, an SVG notation renderer, the song parser and player), songs in data/music/songs/*.yaml (format in the parser's header; node scripts/music/check-songs.js validates them), lessons in static/music/lessons/, metronome and trainer in static/music/rhythm/.
Test Prep	SAT, ACT and CLT math practice built from the ladders' generators, in current and earlier formats (digital and paper SAT, enhanced and legacy ACT), comparison pages, grammar practice, and the AP map (data/testprep/, static/test-prep/).
Brain Puzzles	Printable sheets with answer keys for 21 puzzle families, generated from a sheet code and checked for unique solutions (static/puzzles/).
Homeschool	Free public-domain schoolbooks with step-by-step teaching guides and a "Teach this lesson" mode: Ray's Arithmetic (guides for Primary and Intellectual), McGuffey's Readers and Speller, Webster's Speller, Harvey's Grammar and D'Ooge's Latin (guides for every lesson), plus Latin, Greek, geometry and algebra books to read or download; the old eighth-grade exams with answer notes; a lesson planner (static/homeschool/planner.js, subjects in data/hs_planner.yaml); and a graphing calculator with algebra and calculus (static/homeschool/calc/, no outside libraries). Series pages come from data/hs_series/, guides from data/hs_*.yaml and data/rays_*.yaml, exams from data/hs_exams.yaml.
Math Ladder	Math from Kindergarten through college: 27 courses and 1,305 topics, up through calculus 4, linear algebra, differential equations, discrete math, probability, number theory, complex analysis, numerical analysis, real analysis and abstract algebra, each with a lesson built from first principles, worked examples, visuals for the usual trouble spots, and practice from a problem generator that checks every answer. Mastery-based, with spaced review, checkpoints, a placement check and a skill map. Details below.
Physics Ladder	Physics and astronomy on the Math Ladder engine, with shared progress: Physical Science, Physics 1 and 2 (algebra-based), Mechanics with Calculus, Electricity and Magnetism, Waves, Optics and Modern Physics, Astronomy and Astrophysics. 8 courses and 448 topics, each with a lesson, generated practice that checks numbers with units, and the ph- visual kit. Details below.
Chemistry Ladder	Chemistry, General Chemistry 1 and General Chemistry 2 (219 topics, covering AP Chemistry), on the same engine, with the ch- visual kit and a case-sensitive chemical-formula answer type.
Earth & Space Ladder	Earth Science (middle school), Weather and Climate, and Geology (180 topics), with the es- visual kit.
Economics Ladder	Microeconomics, Macroeconomics and Intermediate Microeconomics (186 topics, covering AP Micro and Macro), with the ec- visual kit. Also in the Business menu.
Logic Ladder	Informal Logic, Traditional Logic and Symbolic Logic (156 topics), with the lg- visual kit (argument maps, fallacy passages, syllogism Venn diagrams, the square of opposition, truth tables, a Fitch-style proof checker) and a prop answer type that checks typed formulas by equivalence.
Etiquette Ladder	Manners for Young Children (read aloud), Manners for Growing Up, and Etiquette for Teens and Adults (148 topics), with the et- visual kit (illustrated scenes with choices, place settings to build, note builders, introductions, posture, envelopes, a printable manners chart). Present-day American customs, with notes where customs differ.
Egyptology Ladder and Ancient Egypt	Ancient Egypt for Young Explorers, History of Ancient Egypt, Middle Egyptian I and II, Religion, Art and Architecture, and Archaeology and Later Scripts (306 topics), with the eg- visual kit (hieroglyph words with sign-by-sign breakdowns, cartouches, a Nile map, a dynasty timeline, temple plans, pyramids, scripts), a translit answer type for Egyptian transliteration (Unicode or Manuel de Codage), and a hieroglyph font drawn for the site (static/egypt/fonts/, OFL). The /egypt/ hub has the full map; the Timeline has an Egypt track. Dates follow Shaw, ed., The Oxford History of Ancient Egypt (2000).
Ancient Scripts Ladder and Linear B	Linear A and Linear B (53 topics): the Bronze Age Aegean, the decipherment, the signs and spelling rules, reading tablets, Mycenaean Greek, and Linear A's undeciphered texts compared with Linear B, with the sc- visual kit (sign lines, the syllabic grid, tablets, maps, numerals). Fonts TRB Linear B and TRB Linear A are drawn for the site (static/scripts/fonts/, OFL). The Languages area has the decipherment story, sign tables, flashcards, six tablets, a name writer and a typing helper.
Vocabulary Ladder	Greek and Latin Roots (40 topics) and Advanced Vocabulary (100 topics of 10 words): 1,000 words, each with a definition, respelling, examples, synonyms, roots, an original memory hook and an illustration drawn by the vo- kit from a scene spec (static/vocab/viz/vocab.js). Word data in data/vocab/words/*.json (node scripts/vocab/build.js regenerates the lessons and generators; check-words.js validates). Flashcards, quizzes, a word list with a page per word, and a print page for any set of word cards (print or Save as PDF; scripts/vocab/make-pdf.js --check checks card fit).
Biology Ladder	Life Science for Young Learners, Life Science, High School Biology and Advanced Biology (AP and College) (262 topics), with the bi- visual kit (static/bio/, data in data/bio/) and an AP Biology map. No sex education by design.
American History & Civics Ladder	American History for Young Learners, U.S. History I and II, Civics and Government, Introduction to Law, and Constitutional Law I and II (375 topics), with the cv- visual kit (static/civics/, data in data/civics/) and APUSH and AP Gov maps. Also the full Federalist Papers, the major Anti-Federalist writings and the ratification debate (data/papers/, layouts/papers/). Citizenship-test practice on the official USCIS questions, 2025 and 2008 versions (page, data in data/civics/uscis/).
Writing & Grammar Ladder	Handwriting: Print and Cursive, First Writing, Grammar (with Reed–Kellogg diagramming), Usage and Mechanics, Composition, and Rhetoric and Advanced Writing (270 topics), with the wr- visual kit (static/writing/, data in data/writing/) and an AP English Language map.
Geography Ladder	Maps and Places, U.S. Geography, World Geography and Human Geography (234 topics), with the gg- visual kit drawing maps in the browser from Natural Earth data (static/geog/, data in data/geog/) and an AP Human Geography map.
Art & Drawing Ladder	Drawing for Young Artists, Drawing Basics, Color and Design, Art History I and II (244 topics), with the ar- visual kit (drawing pad, value scales, perspective, color wheel), a museum walk and flashcards of 189 public-domain works (static/art/, catalog in data/art/images.json). No nudes by design.
Phonics Practice	Twelve steps of letter sounds, blending, word building and decodable stories to practice alongside Hannah Ward's lessons (data/phonics.json, static/homeschool/phonics/, scripts/phonics/test.js).
Brain Games	Mosaic Memory, Coin Match, Numbers in Order, Aqueduct Switches, Oracle's Rule, and Teutoburg's Eagle Hunt and Campaign modes. Progress in trb-brain-v1. No claims beyond fun practice.
Harvard Classics Daily	The 366 daily readings of Fifteen Minutes a Day: The Reading Guide (P. F. Collier, 1930 edition) with the full text of each day's pages from the Harvard Classics (1909–10), proofread against the scans at the Internet Archive. Data in data/harvard/ (guide.json and days/MM-DD.json); scripts/harvard_pages.py writes the day pages; a calendar, /harvard-classics/today/, the home-page card (layouts/partials/hc-today.html), and /harvard-classics/export/, which makes EPUB, PDF (print, up to 92 days at a time) and plain text in the browser from per-month text JSON, with no stored files.
Meal Prep	A family meal planner: 59 recipes that scale to the household (adults, teens, children, toddlers), your own recipes from a 494-item grocery catalog plus write-ins, plans from a week to a month with drag and drop, shuffle and leftovers, a shopping list in store packages by aisle, nutrition from USDA FoodData Central (SR Legacy), a prep-day plan, a kids' dinner chart, 72 from-scratch recipes for store items (breads of many kinds including pretzels and sourdough, pasta, butter, tortillas, stock…) that the shopping list can swap in, a tie-in with the Food Garden Planner (grow-it badges, harvest months, plants needed; data/meals/garden-map.json), PDF and PNG export, and guides (cooking fats, cinnamon, kitchen differences, label checks, food safety). Data in data/meals/ (scripts/meals/check-data.js, fetch-nutrition.py); app in static/meal-prep/; saved in the browser (trb-meals-v1) with JSON backup.
Debate	Learning to debate (18 chapters, including steelman vs strawman), 10 formats with sourced speech times, 50 resolutions with the strongest arguments on both sides, resources for joining or starting a club (including homeschool leagues), a 126-term glossary, and tools: a format-aware timer, flow sheet, case builder, drills and printable ballots (static/debate/, data in data/debate/, scripts/debate/check-data.js).
Library	A catalog of a home library, with editions, sets and translations, and reading paths through it.
Free Books	Search public-domain ebooks (Project Gutenberg, via Gutendex) and audiobooks (LibriVox, via the Internet Archive). Nothing is hosted here; the visitor's browser calls those catalogues directly.
Timeline	The ancient world from the pyramids to the fall of Rome, each event linked to the books, games and readings about it.
Markets	Stock screener and charts, economic indicators, Treasury yields and auctions, and calculators.
Business	Business cases, plus full courses in Econometrics (17 chapters) and Game Theory (14 chapters), each chapter with live simulations, worked examples, practice with answers and a quiz, built on the Science Lab unit framework (data/science_units/econ.yaml and gt.yaml, layouts/business/econ-*.html and gt-*.html, static/business/econometrics/ with the tested statistics library stats.js, and static/business/game-theory/). Business cases: original write-ups of real company stories with the lesson, numbers, timeline, questions and sources, and a card to save as a picture (data/business_cases.yaml, static/business/). Also “Your tax receipt” (static/business/receipt.js): splits an income-tax amount by federal spending, with the main lines from the Treasury's official net outlays by budget function (FiscalData, Monthly Treasury Statement Table 9; negative functions and undistributed offsetting receipts are credits, and lines add up to the amount paid) and the drill-down split in proportion to USAspending.gov obligations.
Resources	Links to other free places to learn Latin and Greek, read the great books and explore ancient history.
Videos	The site's YouTube videos, one page each with an optional short trailer and links to what goes with them. Add a video to data/videos.yaml (keyed by YouTube id); pages come from content/videos/_content.gotmpl, and layouts/_partials/video.html embeds one anywhere (click to play, youtube-nocookie).
The Trades	The next step after Being an Adult 101: courses on how things work and how to fix them: Cars (15 lessons), Plumbing, Electrical, HVAC and Construction (13 each), each with a clickable systems map, interactive diagrams, a troubleshooting finder, a skill ladder, quizzes and a careers lesson with BLS figures. Each course is one data file, data/trades/<course>.json, with lesson pages from content/trades/<course>/_content.gotmpl, shared templates in layouts/trades/ and its widgets in static/trades/<course>/.
Food Garden Planner	Suggests what to grow for a space, climate zone and household, with rough harvests, calories and a crop rotation, plus calculators for laying hens, meat chickens and honeybees and step-by-step guides (layouts/garden/list.html, static/garden/). Crop, guide and animal data with sources are in data/garden/: yields from university extension tables, nutrition from USDA FoodData Central. The "See your garden" pictures (a to-scale plan, a planting calendar from the gardener's own frost dates, weekly harvest, sun and shade with NOAA's solar equations, and day length for hens) are in static/garden/viz/ with their sources in data/garden/viz.json and tests in scripts/garden/model.test.js.
Sewing & Knitting	Step-by-step guides for hand sewing, mending, hemming, the sewing machine, knitting and crochet, with the tools explained (hand, old-fashioned and electric), yarn weights and abbreviations. Guides and tools are in data/sewing.yaml with sources (extension and 4-H guides, Craft Yarn Council); pages come from content/sewing/_content.gotmpl; the stitch diagrams are original SVGs in layouts/_partials/sew-diagram.html.
PhotoCraft	A hosted copy of PhotoCraft, an open-source image editor by the ArtCraft Team (MIT / Apache-2.0). It runs in the browser; pictures stay on the visitor's device. Not affiliated with Adobe.

Measurements on the garden, sewing and outdoor pages can show in US units, metric or both (static/js/units.js converts text inside any element marked data-units; the choice is kept in the browser). Groups of collapsible sections get an Expand all button (in layouts/_partials/extend_footer.html).

No accounts, no ads, no tracking. Progress in the drills, flashcards and games is saved only in the visitor's own browser; the My Progress page can save it to a file and load it on another device. The search button in the header searches every page, infographic and timeline entry.

Languages

• Study companion: the free book that goes with the video Greek and Latin with Jerome, as a PDF and as pages at /languages/jerome/: Part One (foundations), the 124 passages with pronunciation, English and word-by-word notes, the 345 most common Greek and 345 most common Latin words of the New Testament with every form, and the practice sets with their answers. The pages are made from data/jerome/*.json by content/languages/jerome/_content.gotmpl and layouts/jerome/.
• Sentence practice: listen-and-repeat drills from the Gospels (Koine Greek and the Latin Vulgate) and from Caesar, Cicero, Virgil, Ovid, Herodotus, Homer and Plutarch, with English alongside. Every Greek sentence that is not Koine is labelled with its dialect.
• Gospel reader: the four Gospels in Greek and Latin; tap any word for its dictionary form, meaning and grammar.
• Greek alphabet: six short lessons with quizzes.
• Readings: Aesop's fables in Greek, Phaedrus in Latin, the Lord's Prayer and Psalm 23, word by word.
• Sentence trees: see how a sentence is built, in English, Greek and Latin, then build trees yourself.
• Flashcards: vocabulary ranked by frequency, real word forms, "build the form" cards and three-sided Greek–Latin–English cards, with spaced repetition. Words can come from the Gospels, from one of the classical works, from the games, or from all of them at once. Greek is also shown in Latin letters for pronunciation, and any card can be saved as a picture.

Games

Game	What you do	Language
Imperium	Conquer the ancient world territory by territory, with dice	Latin or Greek, by scenario
Ancient Festival Tycoon	Build festival grounds, rise through the ranks, win more land	Greek in Greece, Latin in Rome
Mosaic Match	Match-three with 180 pictured words over 30 levels, plus endless practice	Latin or Koine Greek
Teutoburg	Maze chase through the Teutoburg Forest, AD 9	Latin
Hero's Road	Side-scrolling platformer: Theseus (Greece), Hercules (Rome) or Odysseus, ten levels each, with bosses	Koine Greek (Theseus), Latin (Hercules), Homeric Greek (Odysseus)
Thermopylae	Hold the pass as Leonidas while the Persians close in	Greek
Time Thief	Chase a thief through history by following clues	Greek or Latin
Chess of the Ancients	Chess with Greek or Roman armies	Greek or Latin piece names
Tabula	Backgammon, descended from the Roman game	Latin
Terni Lapilli	The Roman three-in-a-row that Ovid mentions	Latin
Nine Men's Morris	Place, slide and make mills	Latin
Latrunculi	The Roman "game of soldiers", in a modern reconstruction	Latin
Knucklebones	Augustus's dinner-table game from Suetonius, and a modern variant	Latin
Daily Word Puzzle	Guess the day's five-letter word in six tries	Latin or Koine Greek
Charioteer	Top-down city game: chariots, errands, races, a thief and the watch	Latin or Koine Greek
Siege	Fire ancient siege engines at 25 sieges from history and literature, each with a lesson	Latin or Koine Greek, optional

Math Ladder

Twenty-seven courses at /math/<course>/ (Kindergarten through Grade 7, Pre-Algebra, Algebra 1, Geometry, Algebra 2, Precalculus, Probability and Statistics, Calculus 1–4, Linear Algebra, Differential Equations, Discrete Math, Probability, Number Theory, Complex Analysis, Numerical Analysis, Real Analysis and Abstract Algebra), with 1,305 topic pages at /math/<course>/<topic>/, made by content/math/_content.gotmpl from:

• data/math/courses.yaml (the courses and their order) and data/math/topics/<course>.json (units and topics in teaching order, with prerequisites, the skill map behind the placement check and review),
• data/math/lessons/<course>.json (each topic's lesson: why it works, worked examples, common mistakes, visuals and a try-it problem),
• static/math/gen/<course>.js (a problem generator for every topic at three levels, with full worked steps),
• static/math/viz/ (shared visuals in basic.js and adv.js, plus course visuals in <course>.js),
• static/math/core/ (TeX to MathML, the answer checker, the input pad, the mastery and review engine) and static/math/app/ (the hub, course, topic, practice, placement, map and progress pages).

Learning a topic means three right answers with the last two in a row; reviews come back after 1, 3, 7, 16, 35, 75 and 150 days, and a checkpoint mixes topics every few lessons. Progress is kept in the browser under trb-math-v1 and can be moved with a save code. node scripts/math/check-gen.js <course> tests every generator (many seeds and levels, canonical answers accepted by the checker) and node scripts/math/check-course.js checks the skill maps and lessons. hugo --renderSegments math builds just these pages.

The subject ladders (Physics, Chemistry, Earth & Space, Economics, Logic, Etiquette, Egyptology, Ancient Scripts, Vocabulary) and the shared engine

data/ladders.yaml lists the subject ladders that run on Math Ladder's engine (static/math/core/, static/math/app/, layouts/math/). Each ladder has data/<ladder>/courses.yaml, topics/, lessons/, generators in static/<ladder>/gen/, its visual kit static/<ladder>/viz/<ladder>.js (names prefixed, e.g. ph-), and pages from content/<ladder>/. Progress is shared in trb-math-v1, and a topic's prerequisites can sit in another ladder (physics topics send learners to the Math Ladder topic they need first). /math/graph.json holds every ladder's topics. node scripts/math/check-course.js physics and check-gen.js <course> work for any ladder. Answers can carry units (unit, rtol, significant figures, scientific notation).

Science Lab

Listed in data/science_lab.yaml (shown on /science-lab/, in the Education menu, and on the homeschool Science page). Each simulation lives at /science-lab/<slug>/ (the old /games/<slug>/ addresses redirect there), with layouts/science-lab/<slug>.html and static/games/<slug>/, and shares static/games/lab/ (styles and helpers: storage, canvas sizing, missions). The physics, chemistry or biology model is in its own file that also runs in node, so it can be tested.

Simulation	What you do
Magnetic Bottles for Fusion	An explorer of the exact 3-D MHD equilibria in arXiv:2610.07304, checked numerically, with a live guide to what each setting does and a trade-off map, goal finder (scan plus Nelder–Mead, in a Web Worker) and Pareto chart
Book Cart	Swing a chain of 2 to 25 books up from a rolling cart and balance it, or stand every book straight (an inverted pendulum), with live physics, a Lab and an LQR autopilot
Orbit Lab	Newton's cannon, Earth orbits, a trip to the Moon and a gravity assist, with Kepler's laws
Rocket Builder	Build up to three stages and fly to space, orbit or escape; the rocket equation and Δv losses
Trebuchet Workshop	A counterweight trebuchet with a sling (Lagrangian model) and a range finder with air drag
Pendulums and Resonance	A pendulum wave, coupled pendulums and a driven swing with its resonance curve
Circuit Builder	A breadboard solved by nodal analysis: bulbs, switches, resistors, an LED and meters
Optics Bench	Ray tracing with Snell's law and Fresnel reflection: mirrors, lenses, prisms and a raindrop
Gas in a Box	Hard-disk atoms at real scale: pressure, temperature, a piston and diffusion
Mixing Lab	Indicators and pH, a titration curve, and collision-theory reaction rates
Build an Atom	Elements 1 to 36 with their isotopes (NUBASE2020), electron shells, half-life and carbon dating
Sky and Solar System	Planet positions from JPL's elements, Moon phases (Meeus), eclipse seasons and tonight's sky
Predators and Prey	Grass, rabbits and foxes as agents, beside the Lotka–Volterra equations

The deep-dive units live at /science-lab/<unit>/ with one page per chapter. The unit and its chapters are listed in data/science_units/ (newton.yaml, thermo.yaml); each chapter has layouts/science-lab/<unit>-<chapter>.html and static/science-lab/<unit>/<chapter>/ (a tested model, the simulation and its styles), and shares the chapter strip, quiz and progress code in layouts/partials/unit-*.html and static/science-lab/unit.*.

Unit	Chapters
Newton's Laws of Motion	Inertia (Galileo's ramps, a probe in space); F = ma (a cart with live graphs, a hammer and feather on the Moon); action and reaction (skaters, the horse and cart); free-body diagrams (a ramp, an elevator scale, a pulley); momentum and collisions (an air track, crumple zones, billiards); circles and gravity (a whirling string, banked curves, Newton's Moon test, the Cavendish balance)
The Laws of Thermodynamics	Temperature and the zeroth law (blocks in contact, the Maxwell–Boltzmann curve); energy and the first law (a piston on a P–V diagram, Joule's paddle wheel); entropy and the second law (a gas run backward, Einstein solids, Maxwell's demon); engines, refrigerators and heat pumps (Carnot and Stirling engines); absolute zero and the third law (a cooling ladder, evaporative cooling, a log-scale thermometer)

Hero's Road has three settings: Theseus in Greece, Hercules in Rome, and Odysseus sailing home from Troy to Ithaca, with words in Homeric Greek.

The board games have a "move statistics" switch that ranks and colour-codes every move, a statistics panel for the game in progress, the rules and history beside the board, and a two-player mode for two people on one device. Terni Lapilli is fully solved, so its statistics are exact; the others are estimates from searches or from playing each move out many times. Words met in the games are collected on the My Progress page and can be studied as flashcards.

How it's built

The site is static: Hugo with the PaperMod theme, plus plain JavaScript and CSS. There is no framework, no build step beyond Hugo, and no server.

GitHub Actions builds and publishes it to GitHub Pages on every push to main, and again twice each weekday so the Markets pages get fresh economic data.

The site lives at teddyrookbook.com. The older address, teddyrookbookclub.com, forwards to it.

Where things live

content/            Pages. One Markdown file per book in content/books/.
data/               infographics.yaml (the gallery), sets.yaml (book sets and editions) and resources.yaml (the Resources page).
layouts/            Hugo templates, one folder per section.
static/
  css/              Styles for the home page, library and infographics.
  img/              Images, including the infographics.
  lang/             Sentence drills, Gospel reader and flashcards (code and data).
  games/            The games. Each has its own script and stylesheet; the board games share games/board/.
  js/               Shared scripts, including the Greek pronunciation helper.
  photocraft/       The PhotoCraft browser build (app/) and its licences (licenses/). Third-party code; see NOTICE.txt there.
  markets/          Markets pages: charts, rates, indicators, calculators.
  business/         Business hub and the business cases (pages made from data/business_cases.yaml).
scripts/            Python scripts that generate data files (see below).
themes/PaperMod/    The theme.

Running it locally

You need Hugo 0.147 or newer (the extended edition).

git clone https://github.com/TeddyRookBookClub/TeddyRookBookClub.com.git
cd TeddyRookBookClub.com
hugo server

Then open http://localhost:1313.

The economic-data charts and the stock-symbol search will be empty until you download their data (no API key needed):

python3 scripts/fetch_market_data.py

Everything else works without it.

Common edits

• Add a book: run hugo new books/the-title.md, then fill in the fields at the top of the new file. editions lists each copy (set, volume, translation).
• Add an infographic: put name.jpg (1600 px wide) and name-thumb.jpg (520 px wide) in static/img/infographics/, then add an entry to data/infographics.yaml.
• Add a link to the Resources page: add it to data/resources.yaml under the right group.
• Add a timeline event: add it to data/timeline.yaml; it appears on the Timeline and in the search.
• Add a reading path: add it to data/paths.yaml, naming each book by its file name in content/books/.
• Add a What's New entry: add it to the top of data/whatsnew.yaml; it also goes out in the feed at /new/index.xml.
• Add a book set: add it to data/sets.yaml. The name must match the set: value used in the book files.

Generated files

These data files are produced by scripts and shouldn't be edited by hand:

File	Script
static/lang/data/flash.json	python3 scripts/build_flashcards.py static/lang/data
static/games/imperium/maps.js	python3 scripts/build_imperium_maps.py static/games/imperium/maps.js (needs NumPy and SciPy)
data/rays_primary.yaml	python3 scripts/build_rays_primary.py data/rays_primary.yaml (the Ray's Arithmetic lesson guides; edit the script, not the YAML)
data/rays_intellectual.yaml	python3 scripts/build_rays_intellectual.py data/rays_intellectual.yaml
data/jerome/*.json	python3 scripts/jerome/build.py (reads the study companion PDF in static/pdfs/; needs pdfplumber)
static/markets/data/	python3 scripts/fetch_market_data.py (run automatically at each build; not stored in the repository)

Sources and licences

The language data comes from openly licensed scholarly projects, and each keeps its own licence. The full list, with licences, is in static/lang/data/SOURCES.md. In short:

• Greek New Testament: Nestle 1904 text with MACULA Greek morphology (CC BY 4.0) and the Dodson lexicon (public domain).
• Latin Vulgate and classical texts: PROIEL Treebank (CC BY-NC-SA 3.0) and the Perseus treebanks (CC BY-SA 3.0).
• English Scripture: 499 verses of the ESV, © Crossway, used under its quotation allowance. Please don't reuse these beyond that.
• Greek audio: read by Marilyn Phemister, free for non-commercial use with credit.
• Study companion (static/pdfs/ and data/jerome/): Greek text from the SBL Greek New Testament (CC BY 4.0) with MorphGNT word analysis (CC BY-SA 3.0); Latin from the Clementine Vulgate (public domain); Latin forms from Collatinus (GNU GPL v3), corrected by hand. Full credits are on the companion's front page and at the end of the PDF.
• Garden data: university extension publications, USDA FoodData Central and the CDC; each crop and guide section lists its sources.
• Market data: FRED (Federal Reserve Bank of St. Louis), the US Treasury, and TradingView widgets.

Because some of that data is licensed for non-commercial use only, the site as a whole is non-commercial. The infographics and written content are © Teddy Rook; please link to them rather than re-hosting.

Contact

@teddyrookbook on X

Sign Language (/asl/): data/asl.yaml (the family path, tips and links; link out only, never copy other sites' signs or videos), fingerspelling practice (layouts/asl/fingerspelling.html, static/asl/fingerspell.js) using the public-domain handshape drawings static/asl/a.svg–z.svg (Paul Sherman, wpclipart.com, via Wikimedia Commons), and the planner's ASL subject, whose lessons link to Lifeprint's free lessons (data/hs_lifeprint.yaml; planner courses with ext: take lessons from such a data file).

Videos: list YouTube videos in data/videos.yaml and show one with {{ partial "video.html" "<id>" }} (a click-to-play picture; the player loads from youtube-nocookie.com only when pressed). Infographics take video: in data/infographics.yaml; homeschool series take video:/videotitle:.

Outdoor Skills (/homeschool/outdoor-skills/): free ideas for outdoor skills in data/outdoor_skills.yaml, a page per skill from content/homeschool/outdoor-skills/_content.gotmpl, and optional ticks in static/homeschool/outdoor.js (trb-outdoor-v1). By design there are no badges, certificates or awards, nothing that looks official, and no first-aid or safety lessons; any safety note must be well-established guidance. Not affiliated with any scouting organization.

Placement check (/homeschool/placement/, data/hs_placement.yaml, static/homeschool/placement.js): parent-judged ladders for reading, spelling and arithmetic; "Put these in the lesson planner" stores trb-placement-v1, which planner.js applies on load. Practice sheets (/homeschool/practice-sheets/, static/homeschool/sheets.js): copywork/tracing, dictation, handwriting paper and arithmetic drills; the page template publishes homeschool/sheets-data.json with every guided lesson's book passages ("~" lines). Nature Study, Geography and Writing series use the same hs-series/hs-course templates (hs_comstock, hs_long_geography, hs_mother_tongue, hs_palmer).

Simple step-by-step (static/homeschool/simple.js): a switch on lesson, course and Actual Reading pages (stored in trb-hs-simple) that turns each guide into a day's checklist, splitting step bodies into one action per line ("Say:" lines become read-aloud boxes, "~" lines book quotes, "If…" sentences tips); ticks are kept per lesson in trb-hs-simple-ticks. Hannah's curricula have a daily: checklist in data/hs_hannah.yaml.

Science and History (/homeschool/science/, /homeschool/history/): series pages from data/hs_series/science.yaml and history.yaml (science also has an open: list of modern openly licensed textbooks, shown by hs-series.html), with guided courses hs_giberne_stars, hs_giberne_geology, hs_candle, hs_millikan, hs_fmgreece and hs_fmrome. Science guides mark dangerous old experiments "watch only". The series page can also show extras: cards (used for the physics lesson /homeschool/science/balancing-physics/, layout homeschool/balancing.html).

Book Cart (/games/book-cart/): static/games/bookcart/physics.js is the simulation (Lagrange's equations for the cart and n books, an implicit Newmark step, energy bookkeeping and a stability analysis that gives each stack's doubling time); game.js has the levels, Lab, drawing, controls and autopilot (energy pumping, then balancing), with the level table (LEVELS) computed offline: bindings stiff enough for one way to fall, and a slow-motion factor near the top. Progress is stored in trb-bookcart-v2; ?lab=<preset> opens a Lab preset.

Actual Reading (/homeschool/actual-reading/): Hannah Ward's free curricula, linked with her permission. data/hs_hannah.yaml lists each curriculum and every lesson PDF (hosted on hannahwardeducation.com, not copied here); content/homeschool/actual-reading/_content.gotmpl makes a page per curriculum (layouts/homeschool/actual-reading/), and static/homeschool/ar.js picks, shows and ticks lessons (stored under ar-<key> in trb-homeschool-v1). Book links are Hannah's own Amazon affiliate links; keep them as they are. In the planner (data/hs_planner.yaml) her courses have ar: <curriculum key> instead of data, and lessons link straight to her PDFs; a subject can have until (last default age) and replaces (subjects it switches off by default), and a course with alt: true is an "also try" choice that the plan never moves into or on from.

The top menu is grouped: each [[menu.main]] entry in hugo.toml has a group (Education, Business, Games, Miscellaneous), and params.menugroups sets their order. A group with one item of the same name (Games) shows as a plain link; the others are dropdowns. params.menugroupurls gives a group its own page: the group name in the menu links there, the arrow (or hover with a mouse) opens the list, and the page shows every item in the group as tiles (layouts/_default/group.html, layouts/_partials/group-tiles.html, using each item's icon and note). Education and Miscellaneous have pages in content/education/ and content/miscellaneous/; Business uses its own hub at /business/.