🎓
Teen Ages 14-18
Master subjects, explore AI, prep for exams and big ideas.
➗ Math
🔣Algebra Basics: Working with VariablesLearn algebra basics: what variables and expressions mean, combining like terms, the order of operations, and solving si🟦Completing the SquareLearn completing the square step by step: rewrite ax² + bx + c as (x + p)² + q, solve quadratics, find the vertex of a p📈Direct and Inverse ProportionUnderstand direct and inverse proportion: the constant of proportionality, y = kx and y = k/x, how to spot each type, bu🧩Factorising ExpressionsMaster factorising algebraic expressions: find the highest common factor, factor out the HCF, factor expressions with va📊Functions and GraphsUnderstand functions and graphs: function notation f(x), domain and range, plotting linear and quadratic graphs, gradien📐Introduction to Trigonometry (SOH-CAH-TOA)A clear introduction to trigonometry: sine, cosine and tangent in right-angled triangles, SOH-CAH-TOA, finding sides and➡️Introduction to VectorsLearn vectors for beginners: magnitude and direction, column vectors, adding and subtracting vectors, scalar multiplicat💰Budgeting and InterestLearn practical money math: build a budget, track income and expenses, understand simple and compound interest, and see 🎲Probability BasicsA clear intro to probability: the 0 to 1 scale, theoretical vs experimental probability, complementary events, and combi📈Quadratic EquationsMaster quadratic equations: standard form, solving by factoring, the quadratic formula, completing the square, and the d🔬Scientific Notation (Standard Form)Learn scientific notation, also called standard form: writing huge and tiny numbers as a × 10ⁿ, converting both ways, an🧮Simultaneous EquationsLearn to solve simultaneous equations by substitution, elimination and graphing. Step-by-step worked examples, a compari🟰Solving Linear EquationsSolve linear equations confidently: balancing both sides, inverse operations, variables on both sides, and equations wit📉Straight-Line Graphs and GradientsMaster straight-line graphs: the equation y = mx + c, finding gradient and y-intercept, plotting lines, parallel and per√Surds and Irrational NumbersLearn surds and irrational numbers: what makes a number irrational, simplifying surds, adding, multiplying and rationali📐The Pythagorean TheoremUnderstand the Pythagorean theorem a^2 + b^2 = c^2: how it works in right triangles, why it is true, finding the hypoten🧮The Quadratic FormulaMaster the quadratic formula x = (−b ± √(b² − 4ac)) / 2a: how to identify a, b, c, use the discriminant, and solve any q📐The Sine and Cosine RulesLearn the sine rule and cosine rule for any triangle: when to use each, finding missing sides and angles, the area formu
⚛️ Physics
🕳️Black Holes ExplainedA teen physics lesson on black holes: how they form, the event horizon, gravity and spacetime, Schwarzschild radius, spa🛰️Circular Motion and OrbitsA teen physics lesson on circular motion and orbits: centripetal force and acceleration, v²/r, why satellites and planet💪Energy, Work and PowerA teen physics lesson on energy, work and power: the work-energy link, calculating work in joules and power in watts, ef⚛️Introduction to AtomsA teen physics lesson on atoms: protons, neutrons and electrons, atomic number and mass number, isotopes, ions, and how ⚛️Introduction to Quantum PhysicsA teen physics lesson introducing quantum physics: energy quanta, wave-particle duality, the double-slit experiment, the☢️Introduction to RadioactivityA teen physics lesson on radioactivity: unstable nuclei, alpha, beta and gamma radiation, half-life with worked examples🔥Introduction to ThermodynamicsA teen physics lesson on thermodynamics: internal energy, the first and second laws, heat vs temperature, entropy, heat 🎱Momentum and CollisionsA teen physics lesson on momentum and collisions: p = mv, conservation of momentum, elastic vs inelastic collisions, imp🚀Newton's Three Laws of MotionA teen physics lesson on Newton's three laws of motion: inertia, F=ma, and action-reaction, with real-world examples, eq🌈Reflection and Refraction of LightA teen physics lesson on reflection and refraction of light: the law of reflection, Snell's law, refractive index, total🪂Terminal VelocityA teen physics lesson on terminal velocity: how drag balances weight in free fall, why a falling object stops accelerati🌈The Electromagnetic SpectrumA teen physics lesson on the electromagnetic spectrum: radio, microwave, infrared, visible light, ultraviolet, X-rays an🔦Total Internal Reflection and Fibre OpticsA teen physics lesson on total internal reflection and fibre optics: the critical angle, refractive index, Snell's law,
🌿 Nature
🦋Biodiversity and ConservationBiodiversity and conservation explained for teens: why species variety matters, the threats of habitat loss and climate 🌦️Climate and Weather: What's the Difference?Weather vs climate explained for teens: timescales, what drives each, climate zones, and how climate change differs from🧬DNA and Genetics BasicsDNA and genetics basics for teens: the double helix, genes and chromosomes, how traits are inherited, dominant and reces🌍Ecology and BiomesEcology and biomes explained for students: ecosystems, food webs, energy flow, the world's major biomes from rainforest 🐦Evolution and Natural SelectionEvolution and natural selection explained for teens: variation, inheritance, the struggle to survive, Darwin's theory, r🧬Genetics and InheritanceGenetics and inheritance explained for students: genes, alleles, dominant and recessive traits, Punnett squares, Mendel'🛡️How the Immune System WorksHow the immune system works, for teens: physical barriers, white blood cells, antibodies and memory cells, fever, inflam🌱The Nitrogen CycleThe nitrogen cycle explained for students: nitrogen fixation, nitrification, assimilation and denitrification, why nitro
📖 Stories
💌Letters I Never SentAn original coming-of-age story for teens: a shy boy who writes letters he never delivers discovers that the words we ar✉️Letters to TomorrowAn original story for teens: a grieving boy discovers a mailbox that delivers letters to his future self, and learns tha🌊Signal from the DeepAn original sci-fi story for teens: aboard a deep-sea research sub, a young scientist decodes a strange pulse from the a🗺️The Cartographer of DreamsAn original story for teens: a girl who maps her own dreams discovers that the hardest place to chart is the one fear ke🏙️The Glass CityAn original story for teens: in a city where everyone can see everyone else's every move, a teenage girl discovers the c🌊The Keeper of the TidesAn original story for teens: a young woman inherits her grandmother's lonely duty of warning ships from a drowning coast🌱The Last SeedA hopeful science-fiction short story for teens: on a dying Earth, a young engineer named Ren risks everything to plant 🗼The Lighthouse Keeper's DaughterAn original story for teens: when a storm strands her father, sixteen-year-old Nora must keep the lighthouse burning and🎨The MuralAn original coming-of-age story for teens: a guarded teenage artist is assigned to paint a community mural and discovers🔭The Night Shift at the ObservatoryAn original coming-of-age story for teens: a restless teen working night shifts at a fading observatory meets the old as🌅The Summer Everything ChangedAn original coming-of-age story for teens: when her best friend pulls away the summer before senior year, Priya learns t🎻The Violin MakerAn original coming-of-age story for teens: a teen desperate for quick fame as a musician apprentices to an old violin ma🏊The Weight of WaterAn original coming-of-age story for teens: a competitive swimmer whose identity is built on winning learns, after an inj
📚 Books
🤔An Introduction to PhilosophyA free non-fiction book for teens: explore the big questions of philosophy — knowledge, reality, right and wrong, the mi🔬Great Scientists and Their DiscoveriesA free non-fiction book for teens: meet Newton, Darwin, Curie, Einstein and other scientists, and discover the ideas tha📐The Story of MathematicsA free non-fiction book for teens: the human story of mathematics from counting and zero to algebra, geometry, calculus 🌐The Story of the InternetA free non-fiction book for teens: how the internet was built, from ARPANET and packets to the World Wide Web, search en🌍Understanding Climate ChangeA free non-fiction book for teens: how the greenhouse effect, fossil fuels and rising temperatures drive climate change 📈Understanding EconomicsA free non-fiction book for teens: understand scarcity, supply and demand, markets, money, inflation, trade and how whol🌌Understanding Our UniverseA free online non-fiction book for teens: explore the universe from the Big Bang to stars, galaxies, black holes and the
⚽ Sport
🥗Nutrition for Young AthletesA practical nutrition guide for young athletes: how carbs, protein, fats, hydration, and meal timing fuel sport, build r🩹Preventing Sports InjuriesLearn how to prevent sports injuries: acute vs overuse injuries, warming up, technique, recovery, equipment, and the RIC🏋️Strength Training Basics for TeensA safe, science-based guide to strength training basics for teens: how muscles get stronger, why technique beats heavy w🧠The Psychology of SportExplore the psychology of sport: how mindset, motivation, focus, confidence, and managing nerves shape performance, plus⚡The Science of Speed and StrengthExplore the science of speed and strength: muscle fibre types, force and power, the energy systems behind sprinting, and📈Training Principles for Young AthletesUnderstand training principles for young athletes: progressive overload, specificity, recovery, the FITT framework, peri❤️Understanding Heart Rate ZonesUnderstand heart rate zones: what resting and maximum heart rate mean, how to estimate your zones, what each zone trains
🤖 AI
📜A Short History of Artificial IntelligenceA teen timeline of AI history: from Turing and the 1956 Dartmouth workshop through expert systems, AI winters, deep lear💼AI and the Future of WorkA balanced, de-hyped look at AI and the future of work: which tasks get automated, what jobs change rather than vanish, ⚖️AI Ethics and FairnessA grounded teen guide to AI ethics and fairness: bias, transparency, accountability, privacy and power, with real cases 🔒AI, Privacy and Your DataHow AI uses your personal data: collection, training, profiling and inference, plus your real rights, the trade-offs, an🛠️Building Your First AI ModelA practical, honest walkthrough of building your first AI model: framing a problem, gathering and splitting data, traini💼Careers in AIA teen guide to careers in AI: roles like ML engineer, data scientist, prompt designer, AI ethicist and researcher, plus🎭Deepfakes and Fake MediaA clear teen guide to deepfakes and fake media: how AI fakes faces, voices and video, why they spread, the real harms, a🎨Generative AI: Images and TextA teen guide to generative AI: how large language models and diffusion image models work, what prompts do, plus hallucin💬How Chatbots and Language Models WorkA teen guide to how chatbots and large language models work: tokens, next-word prediction, training, fine-tuning, contex📚How Large Language Models Are TrainedA clear, de-hyped guide to how large language models are trained: tokens, pretraining on next-word prediction, fine-tuni📉Overfitting ExplainedA deep, honest look at overfitting in machine learning: why a model that aces its training data can fail on new data, ho🎮Reinforcement Learning (Learning by Reward)A clear, honest guide to reinforcement learning: how an AI agent learns from rewards through trial and error, with real 🧑⚖️Who Is Responsible When AI Goes Wrong?A teen guide to AI accountability: when an AI system causes harm, who is responsible? Explore the chain from data to dep🔮The Future of AI and HumansA grounded teen guide to the future of AI and humans: realistic scenarios, the difference between narrow and general AI,🚧The Limits of AIThe real limits of AI: no understanding, dependence on data, brittleness, hallucination, bias and the things AI genuinel⚖️Training Data and Bias in AIA teen guide to training data and bias in AI: where datasets come from, how sampling, labelling and feedback loops creat🛡️Using AI Safely and ResponsiblyA teen guide to using AI safely: privacy, verifying facts, bias, deepfakes, academic honesty, avoiding over-reliance, an
💻 Coding
🗺️A Text Adventure Game in PythonBuild a text adventure game in Python: design rooms with dictionaries, move the player with input, track inventory and w🌐Build a Simple Web Page with HTMLA teen HTML tutorial: build your first web page from scratch. Learn tags, headings, paragraphs, links, images, and lists❓Building a Quiz App in PythonA teen-friendly Python project: build a working quiz app from scratch using variables, lists, dictionaries, loops, condi✅Building a To-Do List AppA step-by-step teen project: build a working to-do list app with HTML, CSS and JavaScript. Add tasks, store them in an a🔀Conditionals in PythonMaster conditionals in Python: if, elif, and else, comparison and logical operators, and nested conditions. Make your pr📐CSS Flexbox BasicsA practical teen tutorial on CSS Flexbox: turn a container into a flex container, control direction, justify-content, al📒Dictionaries in PythonLearn dictionaries in Python: store data as key-value pairs, look up and update values, loop over items, and avoid KeyEr✨Introduction to JavaScriptAn introduction to JavaScript: variables, data types, functions, conditionals, arrays, and making web pages interactive 🌳JavaScript and the DOMLearn how JavaScript and the DOM work together: select elements, change text and styles, respond to clicks with event li🖱️JavaScript Events and ClicksA practical teen tutorial on JavaScript events: listen for clicks and other user actions with addEventListener, write ev🔁JavaScript Loops and ArraysA clear teen tutorial on JavaScript loops and arrays: store lists of values, read them by index, and process every item 🟨JavaScript Variables and FunctionsA teen-friendly JavaScript tutorial on variables and functions: declare with let and const, work with strings and number🛡️Python Error Handling (try/except)Learn Python error handling with try and except: catch exceptions, handle specific error types, validate user input, and🧩Python Functions and ParametersMaster Python functions and parameters: define functions with def, pass arguments, use default and keyword parameters, r🧷Python Tuples and SetsLearn Python tuples and sets: immutable tuples, tuple unpacking, returning multiple values, plus sets for unique items a🐢Python Turtle GraphicsA teen-friendly Python tutorial on turtle graphics: draw shapes and patterns with a virtual pen, use loops and functions📄Reading and Writing Files in PythonLearn to read and write text files in Python: open files safely with the with statement, use read, readlines and write, 📱Responsive Web Design BasicsA teen-friendly tutorial on responsive web design: use the viewport meta tag, relative units, flexible layouts with flex🔍Sorting and Searching AlgorithmsLearn the classic sorting and searching algorithms: linear vs binary search, bubble and selection sort, how Big-O descri🎨Styling Web Pages with CSSLearn CSS to style web pages: selectors, colors, fonts, spacing with the box model, and layout basics. Make plain HTML l📚Using Python Libraries (modules)Learn how Python libraries and modules work: import the standard library, use math, random, datetime and statistics, pic🔀Version Control with Git: The BasicsGet started with Git version control: understand repositories, the staging area, commits, and a clean workflow. Learn in🗂️What Are Data Structures?Explore data structures in computer science: arrays, linked lists, stacks, queues, hash tables, and trees. Learn how eac🔌What Is an API?A clear teen explainer on APIs: what an Application Programming Interface is, how requests and responses work, what JSON📊Working with CSV Data in PythonRead and write spreadsheet-style data in Python with the csv module: parse rows, use DictReader and DictWriter, total a 🐍Your First Python ProgramA teen-friendly Python tutorial: write your first program, use print, variables, input, and basic math, and understand h