Orbind

Learn any subject in 3-minute lessons.

Bring a PDF, your slides, a photo of your notes or a YouTube video. We turn it into short lessons that ask you questions instead of making you read, then bring back what you forget.

Try for $0

Free, no card. Lesson 1 in about a minute.

Join 500+ students learning with Orbind

90 minutes of reading becomes 3-minute lessons that ask you questions: price goes up, people buy less.

42 pages become 8 short lessons.

Each one builds on the last, so you never meet an idea you weren't taught.

42 pages8 lessons3 min each, simplest first
  1. StartLesson 1 · 3 minDemand
  2. Lesson 2 · 3 minQuantity demandedbuilds on Demand
  3. Lesson 3 · 3 minSupplybuilds on Demand
  4. Lesson 4 · 3 minEquilibriumbuilds on Supply and demand
  5. Checkpoint+ 4 more lessons

What you miss comes back before you forget it.

Each right answer sends the card a little further out.

More sellers bring more coffee to market. The price…

Goes down

  1. TodayMissed
  2. TomorrowRight
  3. In 6 daysRight
  4. In 2 weeksRight

Why it works

Testing yourself beats rereading.

Every lesson is a test, not a reading.

Remembered one week later:
  • Read it 4 times40%
  • Read it once, tested 3 times61%

Roediger & Karpicke, 2006, Psychological Science

Questions

Before you press play.

The things people ask before their first lesson.

  • Will it work with my messy slides?

    Yes. It reads lecture PDFs, photos of the board, pasted notes and YouTube lectures with captions, and teaches only what is in them. A thin lecture makes a short course; a full chapter makes a few units.

  • How long does a lesson take?

    About three minutes: eight to twelve questions, one at a time. A wrong answer comes back at the end of the lesson until you get it.

  • Is it really free?

    Yes. Your first subject is free with no card: one workspace, up to 3 files when you set it up, the whole path, its flashcards and quizzes. Pro ($20/mo) is for the student with five subjects. See what it adds.

  • What happens after I sign up?

    You drop in your material: a PDF, slides, a photo of your notes, pasted text or a YouTube link. About a minute later lesson 1 is ready, and the rest of the path opens as you play.

  • Do I have to write anything?

    No. No prompts, no card-making, no setup. Drop the lecture and press play.

Start here

Bring your lecture. Play lesson 1.

A PDF, slides, a photo of your notes, pasted text or a YouTube video. About a minute to read, three minutes a lesson.

Try for $0