You don't know it until you can teach it.

Explain one idea from your professor's slides. Sancy grades you against them, page by page.

Four ways to learn it for real

Point at a diagram. Your tutor walks you through it.

Superior vena cava Inferior vena cava R. Pulmonary Artery L. Pulmonary Artery AortaPulmonary trunk Pulmonary veins Pulmonary veins Right atrium Right ventricle Left atrium Left ventricle Right lungLeft lung Deoxygenated blood returns from the body through the vena cava into the right atrium. The right ventricle pumps it up the pulmonary trunk, which divides into the pulmonary arteries to both lungs. Gas exchange in the lungs: carbon dioxide leaves the blood and oxygen enters it. Pulmonary veins return oxygenated blood from both lungs to the left atrium, then the left ventricle. The left ventricle pumps it out through the aorta to the body.
Lecture 6: Investing in stocks6 slides
  • 1What a stock isEasy
  • 2Risk and returnEasy
  • 3DiversificationDense
  • 4Buying your first shareEasy
  • 5The P/E ratioDense
  • 6Index fundsEasy

You marked the easy ones. Your tutor will spend its time on the rest.

Slide 3, in plain words

Don't put all your eggs in one basket. Spread your money across many companies, so one bad one can't sink you.

How does photosynthesis work? Explain it back to me.

Plants use sunlight to turn water and carbon dioxide into sugar.

Oxygen is released when light splits water in the leaves.

Nice start. Sunlight, water and carbon dioxide making sugar is exactly right.

Not quite: the roots. Oxygen is released when light splits water, and that happens in the leaves' chloroplasts.

You predicted90
You scored64

26-point gap between how sure you felt and how you did

Your gaps
  • Shifts vs. movements along a curve
  • Elasticity and total revenue
Review again

Say what you need. It takes it from there.

Drop in a PDF, a screenshot of your notes or a chapter of your textbook, then ask the way you'd ask a friend.

Lecture 6.pdf24 pages

Teach me this entire PDF.

On it. I'll teach all 24 pages, one short section at a time, in plain words.

  1. Classical conditioning4 pagesTeaching now
  2. Operant conditioning7 pages
  3. Cognitive dissonance6 pages
  4. Maslow’s hierarchy of needs7 pages

Explain it back.Every section ends with a question, so you know it actually stuck.

My notesScreenshot, then paste

Explain this to me.

Opportunity cost is what you give up when you pick one thing over another.

Say you spend Saturday studying. The cost isn't the studying. It's the movie you skipped.

Say it back to me

Keep going until it clicks.Say it back in your own words, ask for more examples from things you like, or point to the part you don't get and have it explained again.

ENGL 1020Exam in 14 days

Help me study for my exam.

You have 14 days. Here's a plan that starts today:

  • TodaySymbolism20 min
  • TomorrowActive vs. passive voice20 min
  • SunTheme and tone15 min
  • Mon…and a short session every day until

It adapts as you go.Learn something and it drops off your list, so your time goes to what you don't know yet.

Calculus I, Chapter 4Uploaded as a PDF

Teach me Chapter 4.

Chapter 4 has four parts. We'll take them one at a time:

  1. 4.1Related RatesStart here
  2. 4.2Linear Approximations
  3. 4.3Maxima and Minima
  4. 4.4The Mean Value Theorem

Straight from your textbook, just simpler.Every lesson is built from the chapter itself, with a lot less reading.

Meet your study buddies

Together, they help you master anything.

    Who is it for?

    • Ages 18 and up

      I'm in college

      Upload your lecture slides and teach them back. Every answer is checked against the page it came from, and your study plan is built around your exam dates.

    Start with one idea.

    Sign up with just your email, add the slides for the class you're worried about, and teach the first idea back today.

    Try it free. For students 18 and over in the US.