1. Measurement and data
Measurement, graphs and uncertainty
Learn repeats, data processing, graphs and reliability before tackling other investigations.
40 minutesGuided self-study
STEM Knowledge Library
Study Physics, Chemistry, Mathematics and Biology with accurate theory, worked examples, virtual experiments and practice questions.
Open the interactive learning pathway6 lessons
Physics
Open subject page2. Forces and fluids
Buoyancy and density
Investigate upthrust and the conditions for floating, sinking and neutral buoyancy.
35 minutes3. Forces, motion and energy
Resultant force, acceleration, work and energy
Connect force diagrams to motion and test energy transfers.
40 minutes4. Waves and optics
Refraction and Snell’s law
Measure incidence and refraction angles and determine refractive index from evidence.
40 minutes5. Thermal physics and gases
Particles, temperature, heat transfer and gases
Explain thermal phenomena with particles and investigate pressure–volume behaviour.
40 minutes6. Electricity and magnetism
Charge, current, potential difference and circuits
Build circuit reasoning from charge and energy conservation rather than isolated formulas.
40 minutes8 lessons
Chemistry
Open subject page1. Particles, atoms and the Periodic Table
Particle model, atoms and ions
Build from particles to electrons, ions and spectral evidence.
40 minutes2. Bonding and structure
Bonding, structure and material properties
Use microscopic structure to explain melting point, conductivity and solubility.
40 minutes3. Quantitative chemistry
Equations, limiting reagents and yield
Connect reaction observations to balanced equations and quantitative yield.
40 minutes4. Acids, bases and salts
pH, neutralisation and acid–base titration
Determine an unknown concentration from reaction stoichiometry and the equivalence point.
45 minutes5. Rates and equilibrium
Reaction rates and dynamic equilibrium
Explain rates with collisions and predict equilibrium shifts with proper limits.
40 minutes6. Redox and electrochemistry
Electrons, oxidation states and electrochemical cells
Track electron transfer from displacement reactions to current in cells.
40 minutes7. Analysis and practical skills
Identifying substances from converging evidence
Design controlled tests, avoid interfering ions and make appropriately cautious conclusions.
40 minutes8. Organic chemistry and functional groups
Structure, functional groups and organic reactions
Recognise functional groups, predict products and connect conditions with equilibrium and safety.
40 minutes7 lessons
Mathematics
Open subject page1. Number, ratio and numerical reasoning
Numerical foundations for problem solving
Build number sense, connect fractions–ratios–percentages and use factorisation instead of guesswork.
40 minutes2. Expressions, equations and inequalities
Algebra as a language of relationships
Translate situations into expressions, transform equivalently and check solutions in context.
40 minutes3. Functions and graphs
Function graphs and transformations
Predict parameter effects, then test them using graphs and tables.
35 minutes4. Geometry and measurement
From diagram to geometric proof
Use definitions, angle relations, similarity and Pythagoras to reason rather than measure a sketch.
40 minutes5. Coordinates, vectors and transformations
Describing geometry with coordinates and transformations
Connect visual geometry to coordinate rules, vectors and invariants of each transformation.
40 minutes6. Probability and statistics
From randomness to models and evidence
Build sample spaces, distinguish independence from mutual exclusivity and use simulation to understand sampling variation.
40 minutes7. Calculus
Derivatives, tangents and signed area
Explore secant-gradient limits and Riemann sums.
45 minutes7 lessons
Biology
Open subject page1. Cells and microscopy
Cells as the basic unit of life
Learn cell structure through scaled observation, separating visible evidence from inferred structures.
40 minutes2. Membranes and transport
Diffusion, osmosis and active transport
Predict transport direction from gradients and test it using percentage mass change.
40 minutes3. Enzymes and metabolism
Enzymes, temperature and reaction rate
Design a fair test for the effect of temperature or substrate concentration.
40 minutes4. Photosynthesis and respiration
Energy flow in living cells
Connect photosynthesis, respiration and limiting factors through controlled investigation.
40 minutes5. Coordination and homeostasis
Negative feedback, nervous and endocrine control
Model homeostasis and explain nerve signals using ion gradients rather than wire-like electricity.
40 minutes6. Inheritance and variation
Alleles, genotypes and genetic probability
Use genetic crosses to predict ratios and distinguish probability from certainty.
45 minutes7. Ecology and populations
Ecosystems, energy flow and population change
Analyse food webs, productivity and population data without confusing correlation with causation.
40 minutes