Yes. Mathigon is free and does not ask you to register or hand over an email address before you can use it.

How long does Mathigon take?

Clear your evening. We warned you. We file it under "Rabbit hole" — a maths textbook that talks back while you read it.

Does Mathigon work on a phone?

Yes. Mathigon works on a phone as well as it does on a laptop.

Explain Everything

Mathigon

A maths textbook that talks back while you read it

Visit mathigon.org More Explain Everything

mathigon.org

Rabbit hole · Works anywhere

Free, no sign-up · online since 2016

What Mathigon actually is

Courses on geometry, graph theory, fractals, probability and cryptography pause and ask you to do something before continuing, unlocking the next paragraph once you have done it. Polypad, its virtual manipulatives board, comes with tiles, tangrams, number bars and fraction strips.

Why it is worth your time

The text genuinely refuses to move on until you have solved the small step in front of you, which turns reading into something closer to a conversation.

Common questions

Is Mathigon free?: Yes. Mathigon is free and does not ask you to register or hand over an email address before you can use it.
How long does Mathigon take?: Clear your evening. We warned you. We file it under "Rabbit hole" — a maths textbook that talks back while you read it.
Does Mathigon work on a phone?: Yes. Mathigon works on a phone as well as it does on a laptop.
What kind of site is Mathigon?: We list it under Explain Everything — hard things, made suddenly obvious. The text genuinely refuses to move on until you have solved the small step in front of you, which turns reading into something closer to a conversation.

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Explain Everything

Mathigon

A maths textbook that talks back while you read it

Visit mathigon.org More Explain Everything

mathigon.org

Rabbit hole · Works anywhere

Free, no sign-up · online since 2016

What Mathigon actually is

Why it is worth your time

The text genuinely refuses to move on until you have solved the small step in front of you, which turns reading into something closer to a conversation.

Common questions

Is Mathigon free?: Yes. Mathigon is free and does not ask you to register or hand over an email address before you can use it.
How long does Mathigon take?: Clear your evening. We warned you. We file it under "Rabbit hole" — a maths textbook that talks back while you read it.
Does Mathigon work on a phone?: Yes. Mathigon works on a phone as well as it does on a laptop.
What kind of site is Mathigon?: We list it under Explain Everything — hard things, made suddenly obvious. The text genuinely refuses to move on until you have solved the small step in front of you, which turns reading into something closer to a conversation.