Powers, roots, surds and standard form
Use the laws of powers, work with roots and surds, and write huge and tiny numbers in standard form.
8 chapters
Level 4
Start here if you can already: Follow a written argument. Use letters for numbers. If a book feels hard, the one below it in the same topic is a good step back.
Mathematics
7 of 10 books ready. Read them in order.
NextYou are here NextYou are here Percentages, proportion and growth
Use percentages to find changes, and see how amounts grow or shrink over time.
7 chapters
NextYou are here Pythagoras and trigonometry
Find missing sides and angles in triangles, starting with right angled ones.
8 chapters
NextYou are here Similarity, transformations and circles
Move, turn, flip and enlarge shapes, and learn the angle rules hidden in circles.
8 chapters
NextYou are here Area, volume and compound units
Find the volume and surface area of solids like cylinders, cones and spheres, and work with speed and density.
8 chapters
NextYou are here Probability
Work out the chances of one or more events, and use tables, trees and diagrams to keep track.
8 chapters
NextYou are here Linear and simultaneous equations
Solve linear equations and inequalities, and find two unknowns at once.
8 chapters planned
Quadratics
Expand, factorise and solve quadratic equations, and draw their curved graphs.
8 chapters planned
Functions and graphs
Use function notation, learn the shapes of the main graphs, and move them about.
8 chapters planned
Science
7 of 14 books ready. Read them in order.
NextYou are here Cells, photosynthesis and respiration
Cells release energy from food, and plants make that food using light.
8 chapters
NextYou are here Genes and inheritance
Genes carry the instructions for building a living thing, and they pass from parents to children.
8 chapters
NextYou are here Evolution and ecology
Living things change over many generations and depend on each other and their surroundings.
8 chapters
NextYou are here Health, disease and immunity
Germs cause many diseases, and the body, medicines and clean habits help fight them.
8 chapters
NextYou are here Nerves, hormones and balance
Nerves and hormones carry messages that keep the body working and in balance.
8 chapters
NextYou are here Atoms, bonding and the periodic table
Atoms are made of smaller particles, and the way atoms join explains the stuff around us.
8 chapters
NextYou are here Reactions, equations and amounts
Chemical equations show what reacts and what forms, and they let us work out how much.
8 chapters
Newton's laws
Three laws explain how forces change the motion of everything from a ball to a bus.
8 chapters planned
Energy, work and power
Energy can be calculated, and work and power tell us how much moves and how fast.
8 chapters planned
Waves
Waves carry energy from place to place, and light, sound and radio are all waves.
8 chapters planned
Radioactivity
Some atoms are unstable and give out radiation, which can harm us or help us.
8 chapters planned
Circuits and Ohm's law
Current, voltage and resistance are linked, and this lets us design and fix circuits.
8 chapters planned
Magnets, motors and generators
Electric currents and magnets push on each other, and that is how motors and generators work.
8 chapters planned
Atmosphere and climate
The air around the Earth shapes our weather and climate, and people are changing it.
8 chapters planned
Practice papers
One paper for each class and subject, drawn from the books of that class, with a mark scheme. None is ready yet. They are being written now.
Mathematics
Science
Mathematics
Science