Core foundations
Cells, organisation and bioenergetics
Start with cell structures, microscopy, transport, enzymes, organ systems, photosynthesis and respiration.
Free Lessons -> GCSE / Key Stage 4 -> Biology
GCSE Biology
GCSE Biology lessons
Build biology confidence with cells, body systems, genetics, ecology, practical reasoning, worked examples and brief route guidance.
47 lessons availablePractical skills includedSelf-contained lessons
Revision pathways
Applied themes
Disease, control and inheritance
Build the wider biology story: infection, immunity, hormones, genetics, evolution and human response.
Ecology and practical skills
Fieldwork, data and evaluation
Use the ecology and practical pages to practise sampling, graphs, uncertainty, biodiversity and method language.
Start learning
Study skillsCell biologyOrganisationBioenergeticsInfection and responseHomeostasis and responseInheritance, variation and evolutionEcologyPractical skillsExam technique
Lesson 1 · Study skills
Getting Started
Use cells, organisms, practical evidence and precise language to approach biology questions.
Lesson 2 · Cell biology
Cell Structure
Identify animal, plant and bacterial cell structures and use microscopy measurements.
Lesson 3 · Cell biology
Magnification
Use magnification formulae, unit conversions and clear biological drawings.
Lesson 4 · Cell biology
Specialised Cells
Explain how cell structure links to function in tissues, organs and organ systems.
Lesson 5 · Cell biology
Cell Division
Describe growth, repair, differentiation and the benefits and risks of stem cells.
Lesson 6 · Cell biology
Cell Transport
Compare the main transport processes that move substances in and out of cells.
Lesson 7 · Organisation
Enzymes
Explain enzyme action, denaturation and biological molecules in digestion and cells.
Lesson 8 · Organisation
Food Tests
Use safe test methods for starch, sugars, proteins and lipids.
Lesson 9 · Organisation
Digestion
Explain digestion, absorption and how enzymes break large molecules into smaller ones.
Lesson 10 · Organisation
Circulation
Describe double circulation, heart structure, blood flow and health risks.
Lesson 11 · Organisation
Blood Vessels
Compare arteries, veins, capillaries and blood components.
Lesson 12 · Organisation
Gas Exchange
Explain ventilation, alveoli and adaptations for efficient gas exchange.
Lesson 13 · Organisation
Plant Transport
Describe xylem, phloem, transpiration and plant organ adaptations.
Lesson 14 · Bioenergetics
Photosynthesis
Explain photosynthesis, rate factors, leaf adaptations and graph interpretation.
Lesson 15 · Bioenergetics
Respiration
Compare respiration pathways and explain exercise, oxygen debt and fermentation.
Lesson 16 · Infection and response
Pathogens
Compare bacteria, viruses, fungi and protists as causes of disease.
Lesson 17 · Infection and response
Defences
Explain barriers, white blood cells, immunity and vaccination.
Lesson 18 · Infection and response
Medicines
Explain antibiotic use, resistance and the stages of developing medicines.
Lesson 19 · Infection and response
Antibodies
Describe how monoclonal antibodies are made and evaluated in applications.
Lesson 20 · Infection and response
Plant Disease
Identify plant disease evidence and explain physical, chemical and mechanical defences.
Lesson 21 · Homeostasis and response
Nervous System
Describe receptors, neurones, synapses and reflex arcs.
Lesson 22 · Homeostasis and response
Brain and Eye
Explain how the brain and eye coordinate responses and how evidence is evaluated.
Lesson 23 · Homeostasis and response
Hormones
Compare nervous and hormonal control and explain feedback loops.
Lesson 24 · Homeostasis and response
Glucose Control
Explain insulin, glucagon, negative feedback and diabetes treatment.
Lesson 25 · Homeostasis and response
Reproduction
Describe reproductive hormones, contraception and fertility treatments.
Lesson 26 · Homeostasis and response
Kidneys
Explain removal of waste, water balance and body temperature regulation.
Lesson 27 · Homeostasis and response
Plant Hormones
Explain auxins, plant responses, growth and uses of plant hormones.
Lesson 28 · Inheritance, variation and evolution
DNA
Connect DNA, genes, chromosomes, genome and protein coding.
Lesson 29 · Inheritance, variation and evolution
Meiosis
Explain gamete formation, fertilisation and inherited variation.
Lesson 30 · Inheritance, variation and evolution
Genetic Crosses
Use Punnett squares, probability and family information to predict inheritance.
Lesson 31 · Inheritance, variation and evolution
Variation
Compare genetic and environmental causes of variation and mutation.
Lesson 32 · Inheritance, variation and evolution
Evolution
Explain adaptation, selection pressure, survival and evidence for evolution.
Lesson 33 · Inheritance, variation and evolution
Genetic Technology
Compare selective breeding, genetic engineering, benefits, risks and ethics.
Lesson 34 · Ecology
Classification
Use classification, evolutionary trees and biodiversity evidence.
Lesson 35 · Ecology
Ecosystems
Explain communities, abiotic factors, biotic factors and food webs.
Lesson 36 · Ecology
Biomass
Use food chains, pyramids and efficiency calculations to explain biomass transfer.
Lesson 37 · Ecology
Sampling
Plan fieldwork, collect representative samples and calculate population estimates.
Lesson 38 · Ecology
Cycles
Explain decay, microorganisms, carbon cycle and water cycle.
Lesson 39 · Ecology
Human Impact
Evaluate pollution, land use, climate change and conservation actions.
Lesson 40 · Ecology
Food Security
Explain food supply pressures and biological technologies used to improve yield.
Lesson 41 · Practical skills
Biology Maths
Use rates, percentages, means, graphs, magnification and sampling calculations.
Lesson 42 · Practical skills
Microscopy Practical
Prepare slides, use a microscope, draw cells and calculate magnification.
Lesson 43 · Practical skills
Osmosis Practical
Investigate osmosis using potato cylinders, percentage change and controlled variables.
Lesson 44 · Practical skills
Enzyme Practical
Investigate enzyme activity using repeat readings, rate data and temperature or pH.
Lesson 45 · Practical skills
Fieldwork Practical
Use quadrats, transects, sampling strategy and biodiversity data.
Lesson 46 · Practical skills
Practical Skills
Plan fair tests, handle variables, uncertainty, risk and evaluation.
Lesson 47 · Exam technique
Exam Routine
Use a calm routine for diagrams, practicals, command words and checking answers.