Teen Classes

A calm, straight-talking look at how drugs and alcohol change the body and brain, why the teenage years matter, and where to get help.

Learn the parts of a compound microscope and how to bring the tiny world into sharp focus.

Explore the 206 bones that hold you together, then learn respectfully how the body grows up through puberty and how humans reproduce.

Look inside the heart's four chambers and trace blood on its double journey, to the lungs for oxygen and out to the body.

Meet the tiny living things that carry out every part of life inside just one cell.

Discover what plant and animal cells share, and the three clever extras that only plant cells carry.

Meet the bacteria, viruses, and fungi that cause disease, and discover how your white blood cells fight back.

Meet the seven nutrient groups that keep your body running, and learn how to build a healthy, balanced plate.

See how antagonistic muscle pairs bend and straighten your joints, then discover how diffusion moves substances in and out of your cells.

Discover how joints let your skeleton move, and how tendons and ligaments hold everything together.

Discover how your body holds a steady 37°C through homeostasis, sweating, shivering, and clever changes in blood flow.

Follow air deep into your lungs and discover how oxygen and carbon dioxide swap places by diffusion across the alveoli.

Follow food on its journey through the gut and meet amylase, protease, and lipase, the enzymes that break it down.

Zoom from a single tiny cell all the way up to a whole living body, one level at a time.

Discover how the energy in food is measured and learn to work it out from a nutrition label.

Discover how your cells release energy from glucose, with oxygen and without, and why your muscles ache after a sprint.

Discover why removing top ocean predators like sharks can ripple down entire food webs in a trophic cascade.

Journey to hydrothermal vents, where whole ecosystems thrive in total darkness using chemical energy instead of sunlight.

Understand why warming and CO₂ stress coral reefs, and the science-backed efforts giving reefs a fighting chance.

Discover how every rock on Earth belongs to one of three great families, and how they endlessly change into one another over millions of years.

Rank metals from wildly reactive to rock-steady, and watch reactive metals shove others aside.

One simple picture explains it all: why solids hold shape, liquids flow, gases squash, and smells spread. Meet the particle model of matter.

From solid gold to muddy rivers: discover what makes a substance pure and how to pull a mixture apart.

Melt it, burn it, rust it, fizz it: learn the one question that tells a physical change from a chemical one.

Shiny, strong, and conductive versus dull and brittle — discover what sets metals apart from non-metals and why each is chosen for the jobs it does.

Ice to water to steam and back again — explore melting, boiling, and condensing, and how heat gives particles the energy to change state.

Find out why some of Earth's resources run out, and how recycling helps them last longer.

Discover what the air is really made of and how carbon dioxide helps keep our planet warm.

Explore three great families of materials that shape our world, from fired clay to stretchy plastics to super-strong composites.

From a single atom to the periodic table to water itself — learn how elements and compounds build every substance in the universe.

Discover why lemons are sour and soap feels slippery, and how the pH scale, indicators, and neutralisation reveal the hidden chemistry all around you.

Name angles, measure them with a protractor, and use powerful angle facts — straight lines, points, and crossing lines — to hunt down missing angles.

Unlock the link between angles and sides in right triangles. Learn SOH-CAH-TOA and use sine, cosine, and tangent to work with the sides you can't reach.

Master the three rigid transformations — slide a shape, flip it, and turn it — and describe each move precisely on the coordinate grid.

In every right triangle, a² + b² = c². Discover this 2,500-year-old rule, use it to find missing sides, and spot the famous 3-4-5 triangle everywhere.

Similar shapes share the same shape but come in different sizes. Learn how the scale factor links them and use it to find missing lengths on maps, models, and enlargements.

Add up the angles inside any polygon, measure the area of flat shapes, and calculate the volume of solids — three powerful geometry tools in one course.

Count the faces, edges, and vertices of solids like cubes and pyramids — then slice them open to reveal the 2D cross-sections hiding inside.

Prove two shapes are identical with congruence rules, unlock the angle facts hidden in parallel lines, and build perfect shapes with a compass and straightedge.

Meet pi, the number hidden in every circle, and use it to measure the distance around a circle (C = πd) and the space inside it (A = πr²).

Three big ideas about forces: how pressure spreads a force over an area, how moments make things turn, and how Hooke's law links stretch to force.

Meet the three simple laws that explain how everything moves, from a seatbelt to a rocket, discovered by Isaac Newton.

Learn to measure forces with a newton-meter and design a fair test, from variables to results tables and conclusions.

Discover how a simple coil of wire becomes a powerful magnet the instant electricity flows, and how to make it stronger.

Find out how a wire carrying current in a magnetic field feels a force, and how that motor effect spins the motors all around you.

How fast is fast? Learn to measure speed with distance ÷ time, then read and calculate speed straight off a distance-time graph.

See how the same components behave completely differently in series (one loop, shared voltage) versus parallel (branches, full voltage each) circuits.

Sort out the world's energy sources: which ones nature keeps refilling (solar, wind, hydro) and which limited fossil fuels we're burning — and why the difference matters.

Discover what power really means in physics — how fast energy is transferred — and learn to measure it in watts using P = energy ÷ time.

Master the equation at the heart of electronics, V = I × R, and learn to rearrange it to find voltage, current, or resistance in any simple circuit.

Untangle heat from temperature, meet the joule, and find out why a warm bath holds more heat than a spark and why a full kettle needs more energy than a cup.

Explore the three ways heat travels, by contact, by moving fluids, and by invisible infrared waves, and learn to tell them apart in everyday life.

Follow a carbon atom as it loops from the air into plants, through animals, and back again, and see how burning fossil fuels tips the balance.

Dominant, recessive, and the four-box Punnett square, learn Mendel's rules of heredity and predict a Bb x Bb cross's famous 3 to 1 ratio.

A poison almost invisible in the water can become deadly at the top of a food chain. Learn how bioaccumulation and biomagnification concentrated DDT and mercury into eagles, fish, and us.

Variation, a struggle to survive, differential survival, and heredity, the four ingredients of Darwin's big idea, and how they reshape a species over generations.

When habitats shift, species must adapt, move, or disappear. Explore how environmental change reshapes life, from color-changing moths to Galapagos finches and Arctic polar bears.

A single typo in the DNA code can do nothing, cause harm, or hand an organism a new advantage. Explore what mutations are, where they come from, and why evolution depends on them.

Follow the clues, fossils, shared bones, matching DNA, and evolution caught in the act, that together make the case for how life changes over time.

Zoom into a cell to meet DNA, the twisted ladder that codes for life, and see how genes and chromosomes carry a set of instructions from parents to you.

From coral reefs to kelp forests, discover why the variety of life keeps ecosystems stable, what services it gives us for free, and what threatens it.

Paleontologists are detectives of deep time. From a single tooth, a footprint, or a scrap of fossil dung, they rebuild whole vanished worlds. Learn how scientists piece together what ancient landscapes, animals, and food webs were really like.

How do scientists know a rock is a billion years old? Inside every rock sits a hidden clock made of decaying atoms. Learn how half-lives let geologists read the true age of rocks, fossils, and the Earth itself.

The sparrow at your window is a living dinosaur. Follow the fossils that show how feathers, folding wrists, and hollow bones turned small meat-eating dinosaurs into the birds of today.

Five times in Earth's long history, life was nearly wiped out. Meet the Big Five mass extinctions, from the icy end-Ordovician to the asteroid that ended the dinosaurs, and see how the planet recovered each time.

Why does a spider spin a perfect web it was never taught, while a songbird must learn its tune? Explore how instinct, learning, and natural selection shape the way animals behave.

Earth's living variety is shrinking faster than ever. Understand what the biodiversity crisis is, the human forces driving it, and the real solutions helping to turn the tide.

Plot two variables against each other, name the correlation as positive, negative, or none, and draw a line of best fit to make honest predictions.

From boiling hot springs to the frozen deep sea, life finds a way. Meet the extremophiles — tardigrades, heat-loving microbes, and vent creatures — that thrive where nothing should survive.

See how linear equations draw straight lines — and what slope and y-intercept really mean — then meet the U-shaped curves that quadratics make.

For centuries we sorted life by how it looked. Now DNA lets us read the code of life itself, revealing hidden family ties and rewriting the tree of life in astonishing ways.

Two equations, one answer that satisfies both. See why the point where two lines cross solves both equations at once, and read solutions from a graph.

Make any variable the subject. Use inverse operations to rearrange formulas until the letter you actually want stands alone.

Expand products like (x + 3)(x − 2) using the grid method or FOIL, then collect like terms to land on a clean quadratic expression.

Crack the formula behind any arithmetic sequence. Once you can write rules like 4n − 1, you can name the 100th term without listing the 99 before it.

Read approximate values straight off plotted lines and curves — find outputs for given inputs and spot where a graph crosses an axis to estimate solutions.

Do the math on Athenian democracy: only about a third of adults could take part. Learn who was shut out and decide for yourself whether Athens earned its famous title.

Follow Schliemann's dig at Hisarlik and weigh whether Homer's Trojan War really happened. You'll see how archaeology and ancient stories can back each other up — or clash.

Trace the murders, civil wars, and Caesar's fateful river crossing that tore the Roman Republic apart, and debate whether one-man rule under Augustus was inevitable.

History books love emperors and generals — this course studies everyone else. Examine the lives of enslaved people, women in Athens and Sparta, and conquered peoples, and ask why their voices are so hard to find.

An ordinary star 150 million kilometers away: fusion, sunspots, and the space weather that can black out a city.

The real story of shooting stars: the vocabulary of meteoroids and meteorites, why showers happen, how to watch them, and the famous falls that carried amino acids and pieces of Mars to Earth.

How the Sun paints the polar sky green and red — the documented physics of the aurora, from solar wind to glowing oxygen.

The real physics behind the thrills: how the first hill stores energy, what g-forces do to your body, why loops are teardrops not circles, how launches work, and why coasters are engineered fear.

The math behind secret messages — from ciphers you can crack by hand to the public-key trick that quietly protects everything you do online.

How a modern forecast is built: from barometers and folklore to a global sensor network, supercomputers solving the atmosphere as equations, and the chaos that limits how far ahead we can ever see.

The truth about ice ages: we're living in one right now, and Earth's orbit is the clock that runs the deep freeze.

How Earth works and how we know it — from the layers beneath our feet to drifting continents, the rock cycle, weather and climate, and the deep-time history written in stone.

Why Europe took to the seas around 1500 — the hunger for spices, the tools of navigation, the voyages that linked the continents, and the vast human consequences, told honestly.

A documented survey of American history from the colonies to superpower status — the founding ideals, the hard costs, and the movements that widened who counts as 'we the people.'

From Galileo's little tube to the gold mirrors of the James Webb Space Telescope — how humans learned to gather light and see the universe across the whole spectrum.

Volcanoes on Io, hidden oceans on Europa and Enceladus, methane lakes on Titan — a tour of the strange, active, and maybe-habitable moons circling our Solar System.

How a machine that only knows on and off becomes a computer — binary, logic gates, the CPU cycle, memory, software, operating systems, the internet, and the real people and inventions that made it all happen.

The chemistry your class actually covers, made to click: atoms and isotopes, periodic trends, bonding, balancing reactions, the mole, acids and bases, and a first taste of organic chemistry.

A fast, balanced survey of the human story worldwide, from the first farms to the modern age.

The living world explained the way school actually teaches it: cells, DNA, heredity, evolution, body systems, ecosystems, and the unseen microbial world.

Meet the layered army inside you — how your body spots invaders, remembers them, and sometimes attacks the wrong target.

The core physics you meet in school, made clear: motion, forces, energy, waves, electricity, heat, and a straight tour of the modern big ideas.

The real science of tsunamis: what they actually are, what triggers them, the lessons of 2004 and 2011, how we warn people, and how to survive.

How the world became connected by trade, technology, and ideas.

The long fight for rights everyone holds simply for being human.

How Cold War rivalry launched humanity to the Moon in just 12 years.

Batteries, motors, and clever electronics: what makes an EV go.

From a warm breeze to a roaring supercell: the science of how storms form.

Explore Earth's largest habitat: its zones, currents, and hidden deep sea.

The invisible living world of bacteria, archaea, fungi, and viruses everywhere.

How plants turn sunlight, water, and CO2 into the sugar that fuels life.

Two superpowers, no direct war, and decades that nearly ended the world.

Climate is what you expect; weather is what you get. Learn the difference.

How science turns curiosity into evidence you can actually trust.

How Earth's cracked shell drives earthquakes, volcanoes, and mountains.

Why the teenage brain takes risks, feels deeply, and rewires itself.

Gods, monsters, and heroes from cultures across the world.

A respectful tour of the world's great faiths and beliefs.

Separate fact from fiction and think like a scientist.

Argue with logic, evidence, and confidence, not just volume.

Turn an idea into a real business the smart, lean way.

How Einstein rewrote space, time, and gravity forever.

Event horizons, singularities, and the first-ever photo of a black hole.

The Big Bang, dark matter, dark energy, and the fate of everything.