Every spec point.
Plain English.
The revision app mapped directly to AQA & Edexcel specifications. Work through every learning point, layer by layer — from plain English to exam technique.
The Method
Read it
Every specification point broken down into 4 pedagogical layers, from the simplest concepts to advanced context.
Rate it
Rate your confidence after every learning point. Our algorithm tracks exactly what you know and what you're dodging.
Review it
ClearConcept builds a dynamic review queue tailored to your weak points, so you peak exactly when exam season hits.
Hear from our students
ClearConcept was built by tutors who knew exactly which gaps to fill. Here's what students say.
Go as deep as you need
Master complex topics with our signature 4-layer learning method. Click through each level of understanding.
01 Plain English
Diffusion is basically things moving from a crowded place to a space where there's more room, until everything is spread out evenly.
02 Full Explanation
Net movement of particles from a region of higher concentration to a region of lower concentration, down a concentration gradient. It is a passive process resulting from the random motion of particles (kinetic energy).
03 Context & Connections
Related: Gas Exchange
How O₂ enters the alveoli and CO₂ leaves via simple diffusion.
Related: Osmosis
A specific type of diffusion involving water molecules through a partially permeable membrane.
04 Exam Technique
Common Pitfall:
“Students often forget to mention ‘net’ movement or ‘down a concentration gradient’. Always specify these to secure the 2nd mark.”
See all subjects
30 A-level subjects mapped to AQA & Edexcel specifications. Pick yours and start revising today.
Biology
Psychology
Economics
Geography
History
Accounting
Business
Business (Edexcel)
AS Business
Chemistry
Psychology (Edexcel)
Environmental Science
Law
Philosophy
Politics
Physics
Computer Science
English Language & Literature
English Literature
Religious Studies
English Language
Sociology
Statistics (Edexcel)
Geography (Edexcel)
Economics A (Edexcel)
History (Edexcel)
English Language & Literature (Edexcel)
English Language (Edexcel)
English Literature (Edexcel)
History of Art (Edexcel)
Why ClearConcept?
ClearConcept was built by tutors and parents who saw the same problem every single day in sessions: students who'd been through an entire topic but couldn't clearly explain the basic concepts.
Teachers do their best, but they can't guarantee that every student in a class of 30 truly understands every word and idea in the specification. Concepts get skimmed, jargon goes undefined, and confidence crumbles at exam time.
That's the gap ClearConcept fills. Every spec point, broken into layers — starting from plain English and building to exam technique. No fluff, no AI filler. Just clear explanations written by people who teach this material every week.
The problem
“I revised it but I can't explain what it actually means”
The fix
Every concept in plain English first, then built up layer by layer to full exam-ready understanding.