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How it works

Four things worth knowing


  1. 01

    Read the free chapter first

    The first four pages of every course are free, complete, and need no account. If the way they are written does not suit you, you have lost nothing.

  2. 02

    Make an account and pick your subjects

    Tick everything you are studying. One payment, one renewal date, whether that is one subject or four. Accounts are open now; subscriptions open as soon as payment processing is approved.

  3. 03

    Read on any three devices

    Phone, tablet, laptop, school computer, whichever three you use. You can swap a device out yourself from your account whenever you need to.

  4. 04

    Keep it, or cancel it

    A subscription runs for a year and renews on its own. Cancel from your account whenever you like and you keep access until the year you paid for runs out.

Why you cannot download the notes

They stay on the site and are read in the browser. There is no PDF, and every page carries the name and email of whoever is signed in.

These are cheap because a lot of people pay a little, and one shared file undoes that. It is also why corrections reach you the same day: the page you open tomorrow is already fixed, which a downloaded file never is.

Three devices, in practice

A device is claimed the first time you sign in on it, and you sign one out yourself from your account page whenever you want a fourth. Worth knowing: clearing your browser data uses up a slot.

Read a free chapter