287 topics · 12 subjects · 26 languages
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Every topic below is a lesson waiting to be asked for: what it is, why it is hard, the picture it starts with, and the questions learners ask. Name one of your own and the tutor plans it just the same.
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A lesson for every topic
Each topic page explains the idea in plain words, says where it appears in school and university curricula, names what learners find hard, and shows how a live, visual lesson on it goes: ask, plan, explain, interrupt, check. Open a topic, then ask it in your own words.
Grouped by subject below; each subject has a page of its own with its exams and levels.
25 topics
Mathematics
- Quadratic equations
- The derivative as a slope
- Integration by parts
- Limits and continuity
- Matrices and determinants
- Probability and Bayes' theorem
- Trigonometric identities
- Complex numbers and the Argand plane
- Permutations and combinations
- The binomial theorem
- Vectors and the dot product
- Arithmetic and geometric progressions
- Conic sections
- Differential equations
- Eigenvalues and eigenvectors
- Mathematical induction
- The normal distribution
- Fourier series
- Circle theorems
- The Pythagorean theorem
- Linear programming
- Linear regression
- Taylor series
- Prime numbers and the sieve
- Coordinate geometry: the straight line
25 topics
Physics
- Newton's laws of motion
- Projectile motion
- Ohm's law and circuits
- Kirchhoff's rules
- Electromagnetic induction
- Total internal reflection
- Young's double-slit experiment
- The photoelectric effect
- Bohr's model of the atom
- Nuclear fission and fusion
- Simple harmonic motion
- Gravitation and orbits
- Kinetic theory of gases
- The laws of thermodynamics
- The Doppler effect
- Wave interference
- Moment of inertia
- Gauss's law
- Capacitors
- Semiconductors and diodes
- Special relativity
- Escape velocity
- Lenz's law
- Bernoulli's principle
- Heat engines and entropy
25 topics
Chemistry
- Periodic table trends
- Ionic and covalent bonding
- VSEPR and molecular shapes
- Le Chatelier's principle
- Acids, bases and pH
- Redox reactions and oxidation numbers
- Electrochemical cells
- Rates of reaction
- The mole concept and stoichiometry
- Hybridisation of orbitals
- SN1 and SN2 reactions
- Isomerism in organic compounds
- Alkanes, alkenes and alkynes
- Aldehydes and ketones
- Polymers and plastics
- Thermochemistry and Hess's law
- Chemical equilibrium
- Quantum numbers and electron configuration
- Transition metals and colour
- Buffer solutions
- Electrolysis
- Benzene and aromatic chemistry
- Coordination compounds
- The gas laws
- Carbohydrates and proteins
25 topics
Biology
- Photosynthesis
- How a cell makes energy
- Mitosis and meiosis
- DNA replication
- Protein synthesis
- Mendel's laws of inheritance
- Natural selection
- The human heart and circulation
- Neurons and the nervous system
- Enzymes and how they work
- The immune system
- Osmosis and diffusion
- Food chains and ecosystems
- CRISPR and gene editing
- The nitrogen cycle
- Human digestion
- Hormones and homeostasis
- Transport in plants
- Reproduction in flowering plants
- The structure of the nephron
- Evolution and speciation
- Bacteria and viruses
- Biodiversity and conservation
- PCR and genetic engineering
- Blood groups and the Rh factor
25 topics
History
- The French Revolution
- The Indian independence movement
- The Industrial Revolution
- The Mughal Empire
- The causes of World War I
- World War II and its aftermath
- The Cold War
- The fall of the Roman Empire
- The Silk Road
- How the printing press changed everything
- The Renaissance
- The Partition of India
- The American Civil War
- The Russian Revolution
- The Indus Valley Civilisation
- Ashoka and the Mauryan Empire
- The Cholas and maritime trade
- Colonialism and decolonisation
- The Atlantic slave trade
- Ancient Egypt
- The Ottoman Empire
- The Meiji Restoration
- The rise of nationalism in Europe
- Making of the Indian Constitution
- The Gupta golden age
24 topics
Geography and space
- Plate tectonics
- The water cycle
- Monsoons in India
- Climate zones of the world
- Rivers of India
- Soil types and erosion
- Ocean currents and El Niño
- Population and migration
- Urbanisation and megacities
- The Himalayas
- Reading topographic maps
- Latitude, longitude and time zones
- Natural resources and mining
- Agriculture and the Green Revolution
- Volcanoes and earthquakes
- The greenhouse effect and global warming
- Biomes and rainforests
- Map projections
- Weathering and the rock cycle
- Glaciers and ice ages
- Sustainable development
- The solar system
- Phases of the Moon and eclipses
- The life cycle of a star
26 topics
Computer science
- Binary search
- Sorting algorithms
- Recursion
- Big-O notation
- Linked lists and stacks
- Binary trees
- Breadth-first and depth-first search
- Dynamic programming
- Hash tables
- Object-oriented programming
- SQL joins
- How the internet works
- TCP/IP and HTTP
- Cryptography and RSA
- Neural networks
- Gradient descent
- Boolean logic and logic gates
- Operating systems and processes
- Python loops and functions
- Pointers in C
- Compilers and interpreters
- Version control with git
- Machine learning basics
- Finite automata
- Dijkstra's shortest path
- Database normalisation
23 topics
Economics
- Demand and supply
- Elasticity of demand
- GDP and national income
- Inflation and the CPI
- Monetary policy and the RBI
- Fiscal policy and the budget
- Opportunity cost
- Market structures
- Perfect competition and monopoly
- Game theory and the prisoner's dilemma
- Comparative advantage
- The balance of payments
- Exchange rates
- Unemployment
- Poverty and inequality
- Keynesian economics
- Public goods and externalities
- Banking and money creation
- Stocks and bonds
- Cost curves
- The multiplier effect
- India's 1991 reforms
- Behavioural economics
22 topics
Languages
- English tenses
- Articles and prepositions
- Hindi vyakaran: sandhi and samas
- Active and passive voice
- Direct and indirect speech
- Spanish verb conjugation
- The French passé composé
- German cases
- Sanskrit shlokas and their meaning
- Telugu grammar basics
- Tamil Sangam poetry
- Japanese hiragana
- Essay and letter writing
- Reading comprehension strategies
- Phonetics and the IPA
- Idioms and phrasal verbs
- Formal letter format
- Précis writing
- Mandarin tones
- The Arabic script
- IELTS speaking
- Where English words come from
23 topics
Literature
- Shakespeare's Macbeth
- Romeo and Juliet
- Hamlet's soliloquies
- Pride and Prejudice
- To Kill a Mockingbird
- Tagore's Gitanjali
- Premchand's short stories
- The Odyssey
- Metaphor and imagery in poetry
- Wordsworth and Romanticism
- Animal Farm
- Orwell's 1984
- The Great Gatsby
- Characters of the Mahabharata
- The Ramayana across cultures
- Kabir's dohas
- Frankenstein
- Things Fall Apart
- Great Expectations
- Narrative point of view
- Tragedy and the tragic hero
- Magic realism
- The sonnet form
22 topics
Art and design
- Colour theory
- Perspective drawing
- The Renaissance masters
- Impressionism and Monet
- Cubism and Picasso
- Mughal miniature painting
- Madhubani and Warli art
- Gothic architecture
- Indian temple architecture
- Drawing the human figure
- Graphic design principles
- Photography and exposure
- The Bauhaus
- Sculpture and form
- Art Deco
- Pop art
- Typography
- The principles of animation
- Light and shading
- Ukiyo-e woodblock prints
- Surrealism and Dalí
- Rangoli and geometry
22 topics
Music
- Reading sheet music
- Major and minor scales
- Chords and progressions
- Raga and tala in Hindustani music
- Carnatic swaras
- Rhythm and time signatures
- The circle of fifths
- Bach and counterpoint
- Beethoven's symphonies
- How sound waves make notes
- Harmony and intervals
- Jazz improvisation
- Basic guitar chords
- Piano fingering
- Music production and mixing
- Tabla basics
- A short history of Western music
- Song structure
- Ear training
- The orchestra
- Qawwali and Sufi music
- Composing for film
Questions
Asked, Answered
Is this a list of courses?
No. These are topics, each explained on its page and taught live when you ask: there is no catalog to enrol in. Verified courses exist too, in the learner app, each approved by two people before any learner sees it.
My topic is not in the list. Can I still ask?
Yes. The list shows topics learners ask for most across school and university curricula. Any topic in any subject works: type or say it in your own words and the tutor plans the lesson.
Can I learn a topic in my own language?
Yes. Every topic can be taught in any of 26 languages; the lesson is planned in the language you choose, not translated afterwards.
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