The explanation that finally makes it click.
Type what you’re stuck on. Knotstuck makes a short animated lesson for exactly that question. You watch it, make a guess, and try it yourself.
A lesson Knotstuck made
Made for the questionHow do noise-cancelling headphones cancel noise?
- Now it plays.
- Every push meets an equal pull,
- and the air at your eardrum barely moves.
Watch one first
Three real lessons, start to finish. No sign-in.
How it works
Type what you’re stuck on
In your own words, messy is fine. If something is unclear, we ask one question, then get to work.
We make your lesson
It takes about ten minutes. Close the tab if you like: it waits in your lessons.
Watch, try, share
Guess before the answer, move the numbers yourself, then send the link to anyone. It plays in their browser.
Why not just ask a chatbot?
Ask a chatbot for a quick answer. Make a lesson when you need to see it.
| What you get | A chat answer | A video | A Knotstuck lesson |
|---|---|---|---|
| Made for your exact question | Yes | Rarely | Yes |
| Shows the idea moving | Sometimes | Yes | Yes |
| Stops for you to guess and try | No | No | Yes |
| One link to replay and share | A long thread | Yes | Yes |
| Ready | In seconds | Now, if one exists | In about ten minutes |
For the moment it won’t click
Studying for an exam
The one idea the textbook rushes past, shown until you can explain it back.
How do noise-cancelling headphones cancel noise?
Watch this oneLearning maths, physics or ML on your own
No class to ask. Type the question you’d put to a tutor.
How does ChatGPT choose its next word?
Watch this oneExplaining it to someone else
Make the lesson once, then send one link to your class, your team or your kid.
Why do you pay back twice what you borrowed for a home?
Watch this one
Questions about Knotstuck
What is Knotstuck?
Knotstuck is an AI app that makes a short animated lesson for whatever you’re stuck on. You type the question in your own words, Knotstuck makes the lesson in about ten minutes, and you watch it in your browser on a phone or computer. The lesson shows the idea moving, stops for you to guess, and lets you try it yourself.
What can I make a lesson about?
Anything you want to understand: a topic from your course, something from work, or a question you’ve had for years. It works best for ideas you can picture, like maths, physics, chemistry, statistics, economics and machine learning. It explains things; it doesn’t write answers for you to hand in.
How long does a lesson take to make?
It takes about ten minutes. You can close the page while it’s made; the lesson waits in your lessons. The lesson itself is about two minutes long.
How is Knotstuck different from ChatGPT or a YouTube video?
A chatbot gives you an answer to read, and a video is made for everyone. Knotstuck makes one finished animated lesson for your exact question, which stops for you to guess and try, and which you can replay and share. For a quick follow-up question, a chatbot is faster.
Is Knotstuck accurate?
Before you see a lesson, it is checked against a teaching rubric and its facts are checked. A mistake can still slip through.
Is Knotstuck free?
Your first 2 lessons are free. Watching a lesson someone shared with you is free and needs no account.
What are you stuck on?
Say it the way you’d say it to a friend. Your lesson starts from there.