Every A Level, explained properly.
Free, syllabus-aligned notes for Cambridge International AS & A Level, with worked examples and exam technique. Plus a grapher, flashcards, past papers and a planner, all in one calm workspace.
Integration by Parts
Integration by parts is the product rule run backwards. Use it when the integrand is a product of two different kinds of function, such as or , and substitution does not work.
Find .
Algebra beats exponential, so and .
Every subject, held to one standard.
Each course follows its Cambridge International syllabus topic by topic, so you always know what is covered and what comes next.
- Mathematics9709
Pure Mathematics 1 · Pure Mathematics 3 · Mechanics · Probability & Statistics 1 · Probability & Statistics 2
143 notes - Physics9702
AS Physics · A Level Physics
32 notes - Chemistry9701
AS Chemistry · A Level Chemistry
65 notes - Biology9700
AS Biology · A Level Biology
31 notes - Computer Science9618
AS Computer Science · A Level Computer Science
18 notes
Everything between the first lesson and the final paper.
One calm workspace for learning a topic, practising it and keeping it. Open notes in tabs and split panes, and keep the grapher or your flashcards beside them.
Notes that teach, not summarise
Notes written as proper teaching: intuition first, then the formal result, worked examples graded up to exam standard, common mistakes and exam technique.
A grapher for exam curves
Plot, shade and find intersections. Curves are told apart by dash pattern, so they read clearly in print too.
Flashcards that schedule themselves
FSRS spaced repetition brings each card back just before you would forget it.
A cheat sheet that writes itself
Highlight a line in any note and it lands on your cheat sheet, grouped by topic and ready to print.
A plan that ends on exam day
Add your exam dates and rate each topic. Margin schedules weak topics first and brings them back more often.
Synced when you sign in
Start without an account. Sign in and your cards, plans and notes follow you to every device.
Instant and local-first
Every note ships with the app, so pages open without waiting. Your cards and plans save on your device first and sync when you sign in.
Built for the keyboard
Tabs, split panes and a command palette. Press ⌘K to jump to any topic.
Past papers by topic
Official Cambridge past papers, indexed by topic, with your progress kept on every question.
Easy on the eyes
Light and dark themes, both set for long reading sessions, with maths typeset properly throughout.
Free, and built in the open
No paywall and no adverts. The code is on GitHub for anyone to read.
Learn it, keep it, prove it.
The same loop for every topic, in one place, so revision is a habit rather than a scramble.
Learn it properly
Read the note for your next topic. Each one builds the idea from the ground up and works through examples at real exam difficulty.
Make it stick
Turn what matters into flashcards and cheat-sheet lines as you read. Spaced repetition decides when you see them again.
Prove it on paper
Work the practice questions in every note, then real past paper questions on the same topic, and track which ones you have done.
Questions, answered.
Anything else? The documentation covers every tool in detail.
Open the next topic on your list.
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