Step-by-Step Laboratory Practicals for IB, IGCSE & GCSE Science
Welcome to Practical Science — a free library of over 100 detailed laboratory practicals, study guides and revision resources for secondary school science students and teachers. Whether you are preparing for your IB Diploma, Edexcel IGCSE or GCSE exams, you will find clear instructions to help you succeed.
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IGCSE AND IBDP exams start in May 2026 – start revising now with our prescribed practical guides, flashcards and revision tips.
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Effect of Substrate Concentration on Catalase Activity — Michaelis-Menten Kinetics
A fully quantitative IB Biology HL Internal Assessment. Includes the complete method, results table with replicates, a Lineweaver-Burk linearisation, and tailored IA guidance for hitting top marks on Vmax and Km determination.
This Week in Science
A weekly roundup of the biggest trending science stories — from breakthroughs in physics to new discoveries in biology and chemistry. Perfect for keeping up with the latest science news.
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Most Popular Practicals
Iron Tablet Titration
Redox titration to find iron content using KMnO₄
pH and Enzyme Activity
IGCSE prescribed practical with catalase
Esterification and Equilibrium
Determine the equilibrium constant at different temperatures
Food Tests Practical
Test for starch, glucose, protein and fat
Winkler Method (BOD)
Measure dissolved oxygen in water samples
Reactivity Series
Reactions of metals with dilute acids
IGCSE Prescribed Practicals
Complete step-by-step guides for every Edexcel IGCSE prescribed practical, with methods, safety notes, model data and analysis.
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Browse Practicals by Subject
Chemistry (73 practicals)
Titrations, chromatography, rates of reaction, electrolysis, enthalpy, organic chemistry and more. Covering IB Diploma, IGCSE and GCSE specifications.
Biology (21 practicals)
Osmosis, enzyme experiments, microscopy, food tests, photosynthesis, microbiology and ecology. Aligned to IB, IGCSE and GCSE syllabuses.
Physics (25 practicals)
Electricity, waves, mechanics, radioactivity, optics, sound and thermal physics. Step-by-step guides for IB, IGCSE and GCSE students.
Free IB Chemistry 2025 Online Textbook
A comprehensive, interactive online textbook covering the entire IBDP Chemistry 2025 syllabus. Structure 1–3 and Reactivity 1–3 with learning outcomes, practice questions and answers — completely free.
Open the IB Chemistry Textbook →
IB Internal Assessment Help
Preparing your IB Chemistry IA? These guides will help you choose a topic, structure your investigation and score full marks.
10 Golden Rules for Your IA
How to choose the right topic and score highly
How to Write the Perfect IA
Complete guide from topic selection to evaluation
Full Marks in Conclusion Evaluation
Step-by-step guide to the assessment criteria
For Teachers
Study Skills & Exam Prep
Help your students succeed with our guides on science essay writing, revision techniques, and IB IA topic ideas.
Downloadable Resources
Ready-made lesson packs with PowerPoints, worksheets, homework sheets and mark schemes for Edexcel IGCSE and IB Diploma Chemistry and Biology.
For teachers
Mark a whole class in the gaps of your day — Teacher Marking Assistant
A new web-based marking app: scan a class set, OCR the names, mark on any device, then bulk-email marked PDFs to students and parents. Works on PC, Mac, iPad, Android tablet and phone — all syncing in real time.
30-day free trial. Practical-Science readers use code VZLLHRPN for 30% off any plan.
Revision Tools
IGCSE Chemistry Flashcards
Quizlet links for every topic
IGCSE Biology Flashcards
Quizlet links for every topic
IGCSE Physics Flashcards
Quizlet links for every topic
10 Best Revision Websites
Top free resources for IGCSE/GCSE
Get the free IA Error Analysis PowerPoint
Download our full slide deck on equipment uncertainties, combining percentage errors, and a fully worked titration example — a teacher-tested resource you can drop straight into a lesson.
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