Free
$0forever
All the practice, and most of every course.
- The first 60% of the lessons in every course
- Every question bank and past paper
- Every interactive
- Notebooks, points, streaks and progress
- Ask AI and AI marking with your own Gemini key
IGCSE · A Level · IB · AP · SAT
One place to learn, practise and revise.
Courses that follow your syllabus, past papers marked against the real mark scheme, simulations you can get your hands on, and an AI tutor that knows the page you are on.
Correct · 1 / 1 markAsk AI · “Why not 9.0 N?”6-day streak
Built for the exams you actually sit
- AP BiologyAP
- AP Calculus ABAP
- AP Calculus BCAP
- Cambridge IGCSE Biology (0610)Cambridge IGCSE
- Cambridge IGCSE Chemistry (0620)Cambridge IGCSE
- Cambridge IGCSE Computer Science (0478)Cambridge IGCSE
- Cambridge IGCSE Economics (0455)Cambridge IGCSE
- Cambridge IGCSE Mathematics (0580)Cambridge IGCSE
- Cambridge IGCSE Physics (0625)Cambridge IGCSE
- Cambridge International AS & A Level Biology (9700)Cambridge IAL
- Cambridge International AS & A Level Chemistry (9701)Cambridge IAL
- Cambridge International AS & A Level Computer Science (9618)Cambridge IAL
- Cambridge International AS & A Level Economics (9708)Cambridge IAL
- Cambridge International AS & A Level Further Mathematics (9231)Cambridge IAL
- Cambridge International AS & A Level Mathematics (9709)Cambridge IAL
- Cambridge International AS & A Level Physics (9702)Cambridge IAL
- OxfordAQA International AS and A-level Biology (9610)AQA IAL
- OxfordAQA International AS and A-level Chemistry (9620)AQA IAL
- OxfordAQA International AS and A-level Computer Science (9645)AQA IAL
- OxfordAQA International AS and A-level Economics (9640)AQA IAL
- OxfordAQA International AS and A-level Physics (9630)AQA IAL
- OxfordAQA International GCSE Biology (9201)AQA IGCSE
- OxfordAQA International GCSE Chemistry (9202)AQA IGCSE
- OxfordAQA International GCSE Computer Science (9210)AQA IGCSE
- OxfordAQA International GCSE Economics (9214)AQA IGCSE
- OxfordAQA International GCSE Mathematics (9260)AQA IGCSE
- OxfordAQA International GCSE Physics (9203)AQA IGCSE
- Pearson Edexcel International Advanced Level in Biology (YBI11)Edexcel IAL
- Pearson Edexcel International Advanced Level in Chemistry (YCH11)Edexcel IAL
- Pearson Edexcel International Advanced Level in Economics (YEC11)Edexcel IAL
- Pearson Edexcel International Advanced Level in Further Mathematics (YFM01)Edexcel IAL
- Pearson Edexcel International Advanced Level in Mathematics (YMA01)Edexcel IAL
- Pearson Edexcel International Advanced Level in Physics (YPH11)Edexcel IAL
- Pearson Edexcel International GCSE Biology (4BI1)Edexcel IGCSE
- Pearson Edexcel International GCSE Chemistry (4CH1)Edexcel IGCSE
- Pearson Edexcel International GCSE Computer Science (4CP0)Edexcel IGCSE
- Pearson Edexcel International GCSE Economics (4EC1)Edexcel IGCSE
- Pearson Edexcel International GCSE Mathematics A (4MA1)Edexcel IGCSE
- Pearson Edexcel International GCSE Physics (4PH1)Edexcel IGCSE
- Courses
- 39
- Lessons
- 1,430
- Exam questions
- 11,359
- Interactives
- 250
What you get
Practise until exam day feels familiar.
Four things that usually live on four different websites, working together in one.
Question Bank
Past papers, one part at a time.
11,359 past-paper questions, split into parts and sorted by topic and difficulty. See a whole paper at a glance and go straight to what you keep getting wrong.
- Filter by topic, difficulty, paper and your own results
- Answer on screen the way the exam asks
- Original question papers and mark schemes to download
AI marking
Know exactly which marks you dropped.
Written answers are marked point by point against the paper’s own mark scheme, so you see what an examiner would have wanted — not just a tick or a cross.
- Marking points shown one by one
- Works on typed, drawn and handwritten answers
- Free with your own Gemini key, included with Pro
Courses
Lessons that follow your syllabus.
39 courses and 1,430 lessons, each built against its exam board’s specification: notes to read, flashcards to drill, and an assessment to check it stuck.
- Typeset maths, tables and worked examples
- Flashcards and a marked assessment in every lesson
- A notepad beside the lesson for your own working
Interactive Hub
See the idea move.
250 interactives across the sciences, mathematics, computing and economics. Change a value and watch what follows — then practise by doing, not by ticking. The one beside this is live — try it.
- Live graphs, particles and diagrams
- Three levels, up to first-year university
- Every one free, no account needed
Projectile motionTry itMechanics
Range 40.8 m
Max height 10.2 m
Launched at 20 m/s, no air resistance. Drag the slider to take over.
Meet Siggy
A tutor that never minds being asked twice.
Siggy is the Sigma Learn wolf, and the face of Ask AI. Open it beside any lesson or question and ask the small question you actually have. It already knows what you are looking at.
How it works
From “where do I start” to “I’ve got this”.
- 01
Pick your course
Choose your qualification and subject. No account needed to look around.
- 02
Learn, then practise
Read the lesson, try the interactive, then answer real past-paper questions on that exact topic.
- 03
Fix what you got wrong
Marking shows the points you missed. Filter the bank to your mistakes and go again until they are gone.
Subjects
Six subjects, covered properly.
Each subject has courses for several exam boards, question banks built from real papers, and its own shelf in the Interactive Hub.
See coverage by curriculumMathematics
9 courses · 5 question banks · 83 interactives
Physics
6 courses · 4 question banks · 65 interactives
Computer Science
5 courses · 3 question banks · 35 interactives
Chemistry
6 courses · 4 question banks · 30 interactives
Economics
6 courses · 4 question banks · 22 interactives
Biology
7 courses · 4 question banks · 15 interactives
The team
Created, fact-checked and verified by our team.
The content on Sigma Learn is written, fact-checked and verified by our own team before it reaches you.
Content & fact-checkingPavanpreet Gandhi
UCL
MSc Computational Statistics & Machine Learning
Content & fact-checkingChayapon Thunsetkul
UCL
Quantum Physics
Content & fact-checkingPichsinee Poladprao
University of Pennsylvania
International Business
Content & fact-checkingAdithep (Andy) Pasricha
Columbia University
MBA
Who it’s for
Made for learners. Useful to the people helping them.
Pricing
Free to start. Pro for every lesson, and AI without the setup.
Every question bank and interactive is free, and so is the first 60% of every course. Pro opens every lesson and adds AI that works out of the box.
Pro
Every lesson · AI included$11.89/ month
Every lesson, and AI that just works.
- Everything in Free
- Every lesson in every course
- AI tutor included — no key to set up
- AI marking included — written and handwritten answers
On the way
What we are building next.
We would rather tell you than pretend. These are not in the product yet.
Coming soon
Dashboard
One page for your progress across every course and bank.
Coming soon
Calendar & planner
A study plan built around your exam dates.
Coming soon
Classroom
Classes, set work and progress for educators; reports for guardians.
Questions
Frequently asked.
Do I need an account?
No. As a guest you can open every question bank and every interactive, and the first 60% of the lessons in every course; your progress is kept in that browser. A free account keeps your progress, points and notebooks with you on any device.
Which exam boards do the courses follow?
Cambridge, Pearson Edexcel and Oxford AQA for IGCSE and International A Level, and the College Board for AP. The curricula page shows what is live for each.
How is my answer marked?
Choice, ordering, sorting and exact answers are marked instantly. Written, drawn and handwritten answers are marked by AI against the mark scheme.
Is the AI free?
With your own Gemini API key, yes — on the Free plan and as a guest. On Pro the AI is included, so you need no key.
What does Pro add?
Every lesson in every course, and the AI tutor and AI marking included — no key to set up. See pricing.
Do you sell my data or show ads?
No.
Start revising in the next two minutes.
Sign up free and keep your progress, or look around first — no account needed.