Learn with BrainSnail
Every subject below is a full learning track, broken into units and then into small steps you can finish in a few minutes. Each unit page shows what it covers, the path through it, and real example questions with explanations, so you can see exactly what you would be practising before you start.
Tracks start at primary school level and build towards secondary and, in several subjects, introductory university material. You can begin anywhere.
- Subjects
- 22
- Units
- 390
- Steps
- 8,067
- Questions
- 46,177
How the library is organised
Four words do all the work in this section, and they mean specific things.
- A subject
- is a whole track - Biology, Music, Law and Citizenship. Each one runs from primary level to somewhere between secondary and early undergraduate, and its page explains who it suits and which units to do if you will not do all of them.
- A unit
- is a topic inside a subject - The Cell, Ancient Rome, Scales and Keys. Its page says what it covers, where it sits relative to the other units, what people usually get wrong in it, and shows real questions with their explanations.
- A step
- is one short round inside a unit, a few minutes long. Steps unlock in order and get harder as you go, and the last few in a unit pull together everything before them.
- A question
- is what you actually answer. Every one carries a written explanation, shown whether you got it right or not, because getting something right for the wrong reason is easy.
A step is not a fixed test. It is a blueprint that draws a fresh set of questions from its unit every time you start it, so replaying one is a genuinely different round rather than a memory test of the order the answers came in.
Where to start
Anywhere. There is no required order between subjects and nothing is locked. If you want a recommendation rather than a free choice: pick the subject you are already studying or already curious about, open its page, and use the short path it suggests instead of starting at unit one. Three well-chosen units teach more than eighteen half-finished ones.
Every subject also has a study guide - a longer piece on how that subject is actually built, the order that works, and where people reliably get stuck in it. Those are the best thing to read before starting a track you have not studied before.
If you would rather read than answer questions, the blog covers single topics as explainers, and most articles end with real questions from the unit that teaches them. If you would rather just play, the game needs no account and starts immediately.
Choose a subject
Biology
Life science, from the first cells to the molecular machinery of life - one tiny step at a time.
18 units · 2,067 questions
History
The human story, from the Stone Age to the modern world - one tiny step at a time.
18 units · 2,115 questions
Geography
Our planet and its people, from continents and oceans to cities and climate - one tiny step at a time.
18 units · 2,141 questions
Science
Think like a scientist: observe, measure, test, and explore how the world works - one tiny step at a time.
18 units · 2,321 questions
Math
From counting and shapes to algebra, calculus and beyond - number magic one tiny step at a time.
18 units · 2,161 questions
Chemistry
The science of atoms, reactions and materials, from your first fizzing experiment to university-level theory.
18 units · 2,060 questions
Physics
How the world works, from pushes and pulls to atoms and relativity - one tiny step at a time.
18 units · 2,143 questions
Astronomy & Space
The Sun, Moon and planets to galaxies, black holes and the Big Bang - explore the universe one tiny step at a time.
18 units · 2,160 questions
World Mythology
Gods, heroes, monsters and creation stories from every corner of the world - the tales humans have told for thousands of years, one tiny step at a time.
18 units · 2,023 questions
Animals & Nature
Every kind of creature, from the pets on your street to deep-sea fish and vanishing tigers - how animals live, behave and survive, one tiny step at a time.
18 units · 2,028 questions
Food & Cooking
Where food comes from, what heat does to it, how the world cooks, and the science behind every good meal - one tiny step at a time.
18 units · 2,064 questions
Law & Citizenship
Rules, rights, courts and how countries govern themselves - from playground fairness to constitutional law, one tiny step at a time.
12 units · 1,302 questions
Dinosaurs & Prehistoric Life
Tyrannosaurus to trilobites, mammoths to molecular palaeontology - the whole story of ancient life and how we dug it up, one tiny step at a time.
18 units · 1,955 questions
Art
Make, see and understand art - from your first crayon to art history and criticism, one tiny step at a time.
18 units · 2,320 questions
Religion
The world's religions - beliefs, festivals, sacred texts, ethics and big questions - explored as shared human heritage, from first steps to university.
18 units · 2,158 questions
Music
Hear, read and understand music - from your first clap of a beat to scales, chords, history and theory, one tiny step at a time.
18 units · 2,147 questions
Philosophy
Think about the big questions - what is real, what is right, what can we know - from your first wonder to logic, ethics and the great thinkers, one tiny step at a time.
18 units · 2,179 questions
Technology
How our gadgets, computers, code and the internet really work - from your first tap on a screen to programming, AI and cybersecurity, one tiny step at a time.
18 units · 2,148 questions
Psychology
How the mind works - feelings, memory, learning, the brain, and why people do what they do, from your first curiosity to research methods and disorders, one tiny step at a time.
18 units · 2,155 questions
Economics
How money, choices, and the whole economy work - from needs and wants and saving your first coins, to supply and demand, markets, banking, trade, and university macroeconomics, one tiny step at a time.
18 units · 2,144 questions
Language & Literature
Words, stories and poems - from your first letters and rhymes to grammar, literary devices, the classics and university criticism, one tiny step at a time.
18 units · 2,226 questions
Sports
From playground games and the Olympics to the pro leagues and the science of the moving body - one tiny step at a time.
18 units · 2,160 questions
Ready for a tiny brain crawl?
Pick any subject and play a few questions. Slow and steady gets smarter.
Play BrainSnail