Private beta

A math tutor that lets you find your own mistakes.

Write a problem, or take a photo of one. Your tutor watches the page, talks you through it, and marks where to look. It never hands you the answer.

Continue with Google Invite only for now. Use the Google account your invite was sent to.

Find f′(x) if f(x) = cos(x3)

f′(x) = −sin(x³)
(cos u)′ =
f′(x) = −sin(x³) · 3x²

Something's missing at the end of that line. Which rule applies to cos of x cubed?

That's it, the chain rule. And you found it yourself.

The tutor speaks while it marks the page: red for a mistake, blue for its own writing, green when it's right.

How a session goes

  1. 1

    Bring a problem

    Write it on the page, or take a photo of your worksheet. The tutor copies it onto the page and checks it read it right before you start.

  2. 2

    Work it out on the page

    Write each step with a pen, your finger, or a mouse. Every line you write is checked by a math engine, so the tutor knows exactly where things went wrong.

  3. 3

    Get a nudge, not the answer

    It marks where to look and asks the one question that gets you unstuck, out loud, in the chat, or both.

Built to make the rules stick

Name the rule, write the formula

Most mistakes come from skipped steps. The tutor has you name the rule and write its formula before you use it, so it's still there on the test.

It never gives the answer

It circles, underlines and asks. You write the fix, so you're the one who finds it.

Talk, type, or both

Hear the tutor and read along in the chat, or turn the voice off for the library.

Habits, not just answers

When you're done, you may get a quick check worth keeping, like comparing exponents from one line to the next.

About the beta

Who can join

Invited students in grades 9–12. Sign in with the Google account your invite was sent to. Derivatives only, for now.

Your sessions are yours

At the end of a session you choose whether to share it with us to improve the tutor. If you don't, we don't use it.

Tell us how it went

A thumbs up or down after each session is the fastest way to shape what we build next.

Continue with Google

No invite yet? Sign in with Google, then ask for one.