🎓

Teen Ages 14-18

Master subjects, explore AI, prep for exams and big ideas.

➗ Math

🔣MathAges 14-18Algebra Basics: Working with VariablesLearn algebra basics: what variables and expressions mean, combining like terms, the order of operations, and solving si 📐MathAges 14-18Angles on Parallel LinesMaster angles on parallel lines: corresponding, alternate and co-interior angles, how to spot the F, Z and C shapes, wit 🧭MathAges 14-18Bearings and NavigationLearn three-figure bearings for navigation: measuring from north, back bearings, and combining bearings with trigonometr ⭕MathAges 14-18Introduction to Circle TheoremsAn introduction to circle theorems: the parts of a circle, the angle in a semicircle, the angle at the centre, angles in 🟦MathAges 14-18Completing 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 💹MathAges 14-18Compound Interest and Exponential GrowthMaster compound interest and exponential growth: the multiplier method, the compound interest formula, growth vs decay, 📐MathAges 14-18Congruence and SimilarityUnderstand congruence and similarity: when shapes are identical versus scaled copies, the SSS, SAS, ASA and RHS congruen ✏️MathAges 14-18Differentiation BasicsLearn differentiation from scratch: the power rule, dy/dx notation, differentiating polynomials, and finding the gradien 📈MathAges 14-18Direct and Inverse ProportionUnderstand direct and inverse proportion: the constant of proportionality, y = kx and y = k/x, how to spot each type, bu 🔍MathAges 14-18Enlargement and Scale FactorLearn enlargement and scale factor: how to enlarge a shape from a centre, use whole-number, fractional and negative scal ⚖️MathAges 14-18Equations with the Unknown on Both SidesSolve equations with the variable on both sides: collect the unknowns on one side, move the numbers to the other, and ch ✖️MathAges 14-18Expanding Double BracketsExpand double brackets with confidence using FOIL and the grid method: multiply every pair of terms, handle negatives, s 🧩MathAges 14-18Factorising ExpressionsMaster factorising algebraic expressions: find the highest common factor, factor out the HCF, factor expressions with va 📊MathAges 14-18Functions and GraphsUnderstand functions and graphs: function notation f(x), domain and range, plotting linear and quadratic graphs, gradien 📦MathAges 14-18Grouped Data and Class IntervalsOrganise large data sets into class intervals, estimate the mean using midpoints, find the modal and median classes, and 📈MathAges 14-18Introduction to Calculus: Rates of ChangeA teen-friendly first look at calculus: average vs instantaneous rate of change, gradients of chords, limits, and how th 📐MathAges 14-18Introduction to Trigonometry (SOH-CAH-TOA)A clear introduction to trigonometry: sine, cosine and tangent in right-angled triangles, SOH-CAH-TOA, finding sides and ➡️MathAges 14-18Introduction to VectorsLearn vectors for beginners: magnitude and direction, column vectors, adding and subtracting vectors, scalar multiplicat 🏦MathAges 14-18Loans, Savings and Financial MathPractical financial maths for teens: APR, loan repayments, total cost of borrowing, savings growth, and budgeting decisi 💰MathAges 14-18Budgeting and InterestLearn practical money math: build a budget, track income and expenses, understand simple and compound interest, and see 📊MathAges 14-18Percentage Change ProblemsA teen lesson on percentage change problems: profit and loss, percentage error, comparing two changes and growth over ti 🔀MathAges 14-18Permutations and CombinationsLearn permutations and combinations: the counting principle, factorials, nPr and nCr formulas, and when order matters, w 📉MathAges 14-18Plotting Quadratic Graphs and Their RootsPlot quadratic graphs step by step: build a table of values, draw the smooth parabola, find the roots, the turning point 🎲MathAges 14-18Probability BasicsA clear intro to probability: the 0 to 1 scale, theoretical vs experimental probability, complementary events, and combi 📈MathAges 14-18Quadratic EquationsMaster quadratic equations: standard form, solving by factoring, the quadratic formula, completing the square, and the d 🔧MathAges 14-18Rearranging Formulae (Changing the Subject)Learn to rearrange formulae and change the subject: use inverse operations, deal with squares, roots, fractions and fact 🔁MathAges 14-18Recurring DecimalsA teen lesson on recurring decimals: dot notation, why fractions give repeating decimals, and the algebra method to conv 🔄MathAges 14-18Reverse PercentagesA teen lesson on reverse percentages: find the original amount before a percentage increase or decrease by dividing by t 📈MathAges 14-18Scatter Graphs and CorrelationPlot scatter graphs, describe positive, negative and zero correlation, draw a line of best fit, and use it to make predi 🔬MathAges 14-18Scientific Notation (Standard Form)Learn scientific notation, also called standard form: writing huge and tiny numbers as a × 10ⁿ, converting both ways, an 🧮MathAges 14-18Simultaneous EquationsLearn to solve simultaneous equations by substitution, elimination and graphing. Step-by-step worked examples, a compari 🟰MathAges 14-18Solving Linear EquationsSolve linear equations confidently: balancing both sides, inverse operations, variables on both sides, and equations wit 📈MathAges 14-18Solving Simultaneous Equations GraphicallySolve simultaneous equations by drawing graphs: plot each line, find where they cross, read off the solution, and unders 📉MathAges 14-18Straight-Line Graphs and GradientsMaster straight-line graphs: the equation y = mx + c, finding gradient and y-intercept, plotting lines, parallel and per √MathAges 14-18Surds and Irrational NumbersLearn surds and irrational numbers: what makes a number irrational, simplifying surds, adding, multiplying and rationali 🪂MathAges 14-18The Gradient of a CurveUnderstand the gradient of a curve: tangents and chords, why gradient changes along a curve, finding tangent and normal 📐MathAges 14-18The Pythagorean TheoremUnderstand the Pythagorean theorem a^2 + b^2 = c^2: how it works in right triangles, why it is true, finding the hypoten 🧮MathAges 14-18The Quadratic FormulaMaster the quadratic formula x = (−b ± √(b² − 4ac)) / 2a: how to identify a, b, c, use the discriminant, and solve any q 📐MathAges 14-18The 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 🌳MathAges 14-18Tree Diagrams for ProbabilityUse tree diagrams to handle two or more events. Learn to multiply along branches, add the results, and tackle with and w

⚛️ Physics

🌿 Nature

📖 Stories

📚 Books

🤔BooksAges 14-18An Introduction to PhilosophyA free non-fiction book for teens: explore the big questions of philosophy — knowledge, reality, right and wrong, the mi 🎨BooksAges 14-18Great Artists and Their MasterpiecesA free non-fiction book for teens: meet Leonardo, Michelangelo, Rembrandt, Hokusai, Van Gogh, Monet, Frida Kahlo and Pic 🔬BooksAges 14-18Great Scientists and Their DiscoveriesA free non-fiction book for teens: meet Newton, Darwin, Curie, Einstein and other scientists, and discover the ideas tha 🎨BooksAges 14-18The RenaissanceA free online non-fiction history book for teens on the Renaissance: the rebirth of art, science and ideas in Europe, fr 🗳️BooksAges 14-18The Story of DemocracyA free online non-fiction history book for teens on the story of democracy: from ancient Athens to the Roman republic, M 📐BooksAges 14-18The Story of MathematicsA free non-fiction book for teens: the human story of mathematics from counting and zero to algebra, geometry, calculus 🌐BooksAges 14-18The 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 🌍BooksAges 14-18Understanding Climate ChangeA free non-fiction book for teens: how the greenhouse effect, fossil fuels and rising temperatures drive climate change 📈BooksAges 14-18Understanding EconomicsA free non-fiction book for teens: understand scarcity, supply and demand, markets, money, inflation, trade and how whol 🌌BooksAges 14-18Understanding Our UniverseA free online non-fiction book for teens: explore the universe from the Big Bang to stars, galaxies, black holes and the

⚽ Sport

🌬️SportAges 14-18Breathing and Pacing in ExerciseLearn how to breathe and pace yourself during exercise: why breathing fuels your muscles, how to control your effort, an 🔁SportAges 14-18Circuit Training for FitnessLearn what circuit training is and why it works: moving through stations to build strength and stamina together. Include 🤸SportAges 14-18Dynamic Warm-Ups by SportLearn how to build a dynamic warm-up tailored to your sport: the science of preparing the body, and sport-specific routi 🧠SportAges 14-18Exercise and Your Mental HealthExplore how exercise boosts mental health: the brain chemistry behind feeling good, how movement eases stress and lifts 🎯SportAges 14-18How to Practise a Skill EffectivelyLearn the science of skill practice in sport: why quality beats quantity, how the brain learns movements, and proven tec ⏱️SportAges 14-18Interval Training ExplainedLearn what interval training is and why it works: alternating hard efforts with recovery to boost fitness fast. Includes 🦵SportAges 14-18Mobility and Joint HealthDiscover what mobility means, how your joints work, and why moving them through a full range keeps you supple, strong an 🥗SportAges 14-18Nutrition for Young AthletesA practical nutrition guide for young athletes: how carbs, protein, fats, hydration, and meal timing fuel sport, build r 🦘SportAges 14-18Plyometrics for TeensUnderstand plyometrics: jumping and bounding exercises that build explosive power using the stretch-shorten cycle. Learn 🩹SportAges 14-18Preventing Sports InjuriesLearn how to prevent sports injuries: acute vs overuse injuries, warming up, technique, recovery, equipment, and the RIC 🏃SportAges 14-18Sprint and Acceleration TrainingLearn the science of sprinting fast: how acceleration, top speed and mechanics work, why technique and force matter, and 🏋️SportAges 14-18Strength Training Basics for TeensA safe, science-based guide to strength training basics for teens: how muscles get stronger, why technique beats heavy w 🧠SportAges 14-18The Psychology of SportExplore the psychology of sport: how mindset, motivation, focus, confidence, and managing nerves shape performance, plus ⚡SportAges 14-18The Science of Speed and StrengthExplore the science of speed and strength: muscle fibre types, force and power, the energy systems behind sprinting, and 📈SportAges 14-18Training Principles for Young AthletesUnderstand training principles for young athletes: progressive overload, specificity, recovery, the FITT framework, peri ❤️SportAges 14-18Understanding Heart Rate ZonesUnderstand heart rate zones: what resting and maximum heart rate mean, how to estimate your zones, what each zone trains

🤖 AI

📜AIAges 14-18A Short History of Artificial IntelligenceA teen timeline of AI history: from Turing and the 1956 Dartmouth workshop through expert systems, AI winters, deep lear ✍️AIAges 14-18AI and Creative WritingAn honest teen guide to AI and creative writing: how language models generate stories and poems, what they are genuinely 💼AIAges 14-18AI 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, ⚖️AIAges 14-18AI Ethics and FairnessA grounded teen guide to AI ethics and fairness: bias, transparency, accountability, privacy and power, with real cases 🌫️AIAges 14-18AI Hallucinations ExplainedA teen AI lesson on AI hallucinations: why chatbots sometimes make up confident but false answers, why it happens, how t 🌍AIAges 14-18AI in Climate ScienceA clear teen guide to AI in climate science: how machine learning improves climate models, tracks emissions and deforest 🔒AIAges 14-18AI, Privacy and Your DataHow AI uses your personal data: collection, training, profiling and inference, plus your real rights, the trade-offs, an 🛠️AIAges 14-18Building Your First AI ModelA practical, honest walkthrough of building your first AI model: framing a problem, gathering and splitting data, traini 💼AIAges 14-18Careers in AIA teen guide to careers in AI: roles like ML engineer, data scientist, prompt designer, AI ethicist and researcher, plus 🎭AIAges 14-18Deepfakes 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 🎨AIAges 14-18Generative AI: Images and TextA teen guide to generative AI: how large language models and diffusion image models work, what prompts do, plus hallucin 🕵️AIAges 14-18How AI Detects DeepfakesA teen AI lesson on how AI detects deepfakes: what fake videos and voices are, the tell-tale clues detectors look for, h 🎨AIAges 14-18How AI Image Generators WorkA clear look at diffusion: how AI image generators start from noise and remove it step by step, guided by your text prom 💬AIAges 14-18How Chatbots and Language Models WorkA teen guide to how chatbots and large language models work: tokens, next-word prediction, training, fine-tuning, contex 📚AIAges 14-18How Large Language Models Are TrainedA clear, de-hyped guide to how large language models are trained: tokens, pretraining on next-word prediction, fine-tuni 📉AIAges 14-18Overfitting ExplainedA deep, honest look at overfitting in machine learning: why a model that aces its training data can fail on new data, ho 🎮AIAges 14-18Reinforcement Learning (Learning by Reward)A clear, honest guide to reinforcement learning: how an AI agent learns from rewards through trial and error, with real 🧑‍⚖️AIAges 14-18Who 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 🔮AIAges 14-18The Future of AI and HumansA grounded teen guide to the future of AI and humans: realistic scenarios, the difference between narrow and general AI,🚧AIAges 14-18The Limits of AIThe real limits of AI: no understanding, dependence on data, brittleness, hallucination, bias and the things AI genuinel ⚖️AIAges 14-18Training 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 🛡️AIAges 14-18Using AI Safely and ResponsiblyA teen guide to using AI safely: privacy, verifying facts, bias, deepfakes, academic honesty, avoiding over-reliance, an 🤖AIAges 14-18What Are AI Agents?Learn what AI agents are: programs that take a goal, plan, use tools, act, and check results in a loop. See concrete exa

💻 Coding

🗺️CodingAges 14-18A Text Adventure Game in PythonBuild a text adventure game in Python: design rooms with dictionaries, move the player with input, track inventory and w 📊CodingAges 14-18Making a Bar Chart in Python with MatplotlibTurn numbers into a picture: install matplotlib, draw a bar chart from your data, add titles and labels, colour the bars ⏱️CodingAges 14-18Big O and Algorithm SpeedLearn Big O notation and how to measure algorithm speed: O(1), O(n), O(n squared) and O(log n), why it matters as data g 🔌CodingAges 14-18Boolean Logic and Logic GatesLearn Boolean logic and the AND, OR and NOT logic gates that power every computer. Build truth tables, combine gates, an 🌐CodingAges 14-18Build a Simple Web Page with HTMLA teen HTML tutorial: build your first web page from scratch. Learn tags, headings, paragraphs, links, images, and lists 🚀CodingAges 14-18Building a Landing Page from ScratchBuild a complete, responsive landing page with HTML and CSS: a hero section, feature cards, a call-to-action and a foote ❓CodingAges 14-18Building a Quiz App in PythonA teen-friendly Python project: build a working quiz app from scratch using variables, lists, dictionaries, loops, condi ✅CodingAges 14-18Building 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 🧱CodingAges 14-18Classes and Objects in Python: An Intro to OOPLearn object-oriented programming in Python: define classes, create objects, use __init__, attributes and methods, with 🔌CodingAges 14-18Computer Networks and ProtocolsComputer networks and protocols explained: LANs vs the internet, how routers and switches move data, and key protocols l 🔀CodingAges 14-18Conditionals in PythonMaster conditionals in Python: if, elif, and else, comparison and logical operators, and nested conditions. Make your pr 📐CodingAges 14-18CSS Flexbox BasicsA practical teen tutorial on CSS Flexbox: turn a container into a flex container, control direction, justify-content, al 🔲CodingAges 14-18CSS Grid Layout BasicsLearn CSS Grid: build two-dimensional layouts with grid-template-columns, rows, gap, fr units, repeat() and grid spannin ✨CodingAges 14-18CSS Transitions and AnimationsBring web pages to life with CSS: smooth hover transitions, the transition property, transform, and full @keyframes anim 🗄️CodingAges 14-18Introduction to Databases and TablesLearn what a database is, how tables store data in rows and columns, primary keys, relationships, and how to read and wr 📅CodingAges 14-18Dates and Times in Python with datetimeWork with dates and times in Python using the datetime module: get today, build specific dates, find differences with ti 📒CodingAges 14-18Dictionaries in PythonLearn dictionaries in Python: store data as key-value pairs, look up and update values, loop over items, and avoid KeyEr 🔐CodingAges 14-18Encryption and Keeping Data SafeEncryption explained for teens: plaintext vs ciphertext, the Caesar cipher, symmetric vs public-key encryption, hashing,🧵CodingAges 14-18F-Strings and String Formatting in PythonMaster Python f-strings: embed variables, run expressions, format numbers and decimals, pad and align text, with clear l 🪢CodingAges 14-18Build a Hangman Game in PythonBuild a complete Hangman word-guessing game in Python step by step: pick a secret word, track guessed letters, limit wro 🗜️CodingAges 14-18How Data Is CompressedHow data compression works: lossless vs lossy, run-length encoding, Huffman coding, and why JPEG and MP3 throw data away 🌐CodingAges 14-18How Web Browsers WorkSee what really happens when you open a web page: the URL, DNS, the request and response, and how the browser parses HTM ✨CodingAges 14-18Introduction to JavaScriptAn introduction to JavaScript: variables, data types, functions, conditionals, arrays, and making web pages interactive 🌳CodingAges 14-18JavaScript and the DOMLearn how JavaScript and the DOM work together: select elements, change text and styles, respond to clicks with event li 🔀CodingAges 14-18JavaScript Conditionals in DepthGo beyond basic if statements: master comparison operators, ===, logical AND/OR/NOT, else if chains, truthy and falsy va 🖱️CodingAges 14-18JavaScript Events and ClicksA practical teen tutorial on JavaScript events: listen for clicks and other user actions with addEventListener, write ev 🧩CodingAges 14-18JavaScript Functions in DepthMaster JavaScript functions: parameters and arguments, return values, default parameters, arrow functions, scope and clo 🔁CodingAges 14-18JavaScript Loops and ArraysA clear teen tutorial on JavaScript loops and arrays: store lists of values, read them by index, and process every item 🟨CodingAges 14-18JavaScript Variables and FunctionsA teen-friendly JavaScript tutorial on variables and functions: declare with let and const, work with strings and number λCodingAges 14-18Lambda, Map and Filter in PythonLearn Python lambda functions plus map and filter: write tiny anonymous functions, transform and filter lists, compare w 📈CodingAges 14-18Line Charts in Python with MatplotlibPlot line charts in Python with Matplotlib: draw a single line, add titles and labels, plot multiple lines with a legend 🔐CodingAges 14-18Build a Password Generator in PythonCode a strong, random password generator in Python. Choose a length, mix letters, digits and symbols, and build the pass 🛡️CodingAges 14-18Python Error Handling (try/except)Learn Python error handling with try and except: catch exceptions, handle specific error types, validate user input, and 🧩CodingAges 14-18Python Functions and ParametersMaster Python functions and parameters: define functions with def, pass arguments, use default and keyword parameters, r 📝CodingAges 14-18Python List ComprehensionsLearn Python list comprehensions: build a new list in one readable line, add an if filter, transform items, and know whe 🗂️CodingAges 14-18Nested Lists and Dictionaries in PythonLearn to nest data in Python: lists inside lists (grids), dictionaries inside dictionaries, and lists of dictionaries fo 🔤CodingAges 14-18Python String Methods Deep DiveGo deeper with Python string methods: case conversion, strip, replace, split and join, find and count, startswith and en 🧷CodingAges 14-18Python Tuples and SetsLearn Python tuples and sets: immutable tuples, tuple unpacking, returning multiple values, plus sets for unique items a 🐢CodingAges 14-18Python Turtle GraphicsA teen-friendly Python tutorial on turtle graphics: draw shapes and patterns with a virtual pen, use loops and functions 🔁CodingAges 14-18The while-else Pattern in PythonLearn Python's unusual while-else loop: the else block runs only when the loop finishes without a break. See how it clea 📄CodingAges 14-18Reading 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, 🔁CodingAges 14-18Recursion ExplainedUnderstand recursion: how a function can call itself, why every recursion needs a base case, and how the call stack work 🔁CodingAges 14-18Recursion in Python: Functions That Call ThemselvesUnderstand recursion in Python: base cases, recursive cases, the call stack, factorial and countdown examples, plus when 🖼️CodingAges 14-18Responsive Images and Media QueriesMake images and layouts adapt to any screen: fluid images, the srcset and sizes attributes, the picture element, and med 📱CodingAges 14-18Responsive Web Design BasicsA teen-friendly tutorial on responsive web design: use the viewport meta tag, relative units, flexible layouts with flex 🏗️CodingAges 14-18Semantic HTML ElementsLearn semantic HTML: use header, nav, main, section, article, aside and footer to give your pages meaning, better access 🔍CodingAges 14-18Sorting and Searching AlgorithmsLearn the classic sorting and searching algorithms: linear vs binary search, bubble and selection sort, how Big-O descri 🎨CodingAges 14-18Styling Web Pages with CSSLearn CSS to style web pages: selectors, colors, fonts, spacing with the box model, and layout basics. Make plain HTML l 📦CodingAges 14-18The CSS Box Model ExplainedMaster the CSS box model: content, padding, border and margin, plus box-sizing: border-box and why elements take the spa 📚CodingAges 14-18Using Python Libraries (modules)Learn how Python libraries and modules work: import the standard library, use math, random, datetime and statistics, pic 🔀CodingAges 14-18Version Control with Git: The BasicsGet started with Git version control: understand repositories, the staging area, commits, and a clean workflow. Learn in 🗂️CodingAges 14-18What Are Data Structures?Explore data structures in computer science: arrays, linked lists, stacks, queues, hash tables, and trees. Learn how eac 🔌CodingAges 14-18What Is an API?A clear teen explainer on APIs: what an Application Programming Interface is, how requests and responses work, what JSON 📊CodingAges 14-18Working with CSV Data in PythonRead and write spreadsheet-style data in Python with the csv module: parse rows, use DictReader and DictWriter, total a 🗂️CodingAges 14-18Working with JSON in Python: Save and Load DataLearn to read and write JSON in Python with the json module: json.dumps, json.loads, json.dump and json.load, plus a wor 🐍CodingAges 14-18Your First Python ProgramA teen-friendly Python tutorial: write your first program, use print, variables, input, and basic math, and understand h