Account
Your account
Accounts are not open yet
Reading, the instruments and your progress in this browser all work without an account.
Back to the topicsWhen they open, an account keeps the lessons you have read on every device. Make one in any of three ways:
- Googleyour Google account
- GitHubyour GitHub account
- Emailyour address and a passkey on your device
Sign in
Use the way you signed up.
Signed up with email? Your device lists your passkey under your address.
What an account opens
The members’ sections: Filter design, Random signals, Applications, Eigenvalues and eigenvectors, The singular value decomposition, Statistics, Neural networks, Trees and Graphs. And your place in every lesson, on every device.
Create a free account
You can delete it at any time.
By creating an account you accept the terms of use.
Continue where you left off
This week
Progress by subject
Parts completed
Saved pictures
Recently read
Bookmarks
Questions to revisit
Progress in this browser
This browser remembers the lessons you have read and where you stopped.
Account
Settings
Profile
About you
Optional. Only counted together with everyone’s answers; it never changes what you see.
Ways to sign in
Passkeys
Sign out
Email updates
Reading statistics
Off unless you turn it on. On, the pages you read are counted with a code for your account, so we can see how readers move through a subject. Off again stops it at once. How statistics work
Your data
Download everything your account holds as a JSON file, or delete the account and every record of it, email updates included, at once. Deleting cannot be undone.
What we hold
- Sign-in the services or email address you sign in with, your passkeys’ public keys, and a record of each signed-in browser
- Profile your name, what you say you are, and your answers under About you
- Reading the lessons you have read and when, the last one you opened, and your weekly goal
- Library your bookmarks, the pictures you save (up to 200), and your quiz answers and best scores
- Choices your 13-or-over statement, email updates, the statistics link, and which profile questions you answered or skipped