Wish lectures had a pause key?
We made something better.
Listens in during your lecture and writes flashcards on demand — press a key the moment you lose the thread.
We email you a code when a place opens up, and nothing else. Already have one? Sign up here.
What the professor just said
The derivative is the slope of the tangent line
- The rate of change at one exact point
- Found as a limit of average slopes
Big line = the answer. Small lines if you have a spare second.
Three keys, three questions
One key cannot mean three things.
You drifted. The board has moved on.
Since your last card
He finished limits, then defined the derivative
- Derivative = limit of the difference quotient
- Then worked the power rule on x³
One term flew past and took the sentence with it.
Chain rule
Outside derivative times the derivative of the inside
- For f(g(x)) that is f′(g(x)) · g′(x)
- Use it when one function sits inside another
You followed the card. It still is not concrete.
Works while a card is on screen.
Example of the card above
d/dx of sin(x²) is cos(x²) · 2x
- Outside is sine, inside is x squared
- Forgetting the 2x is the usual slip
Press again for a different angle, not the same card twice.
Three problems, not one
Walking in cold, losing the thread, rebuilding it a week later.
Before
Pre-lecture summary
- Terms you are about to hear
- Concepts with quick intuition
- Five questions to test yourself
During
Cards
- space, S and X
- Drafted ahead, so a press lands fast
- Every card names its source
After
Review
- Leads with what you struggled with
- Full prose, not fragments
- Researched further, with links
Why LectureBird?
Not a better chatbot. Closer to the moment you actually lost the thread.
It is faster than asking
A chat tab makes you stop, phrase the question and wait. A key does not — it has been listening, so the answer is already there.
It reads your own files first
Slides, the chapter, the syllabus, your notes. Answers come back with the page they were found on, so you can tell trust from guesswork mid-lecture.
It stays out of the way
It sits beside you during the lecture. It does not take notes for you, and it never puts anything on screen you did not ask for.
- A transcript afterwardsAnswers during
- Notes taken for youCards only when you ask
- A box to type intoOne key
- Everything summarised equallyWhat you struggled with, first
Three steps to start
Nothing to install. It runs in a tab.
Make a class
Drop in slides, a chapter, the syllabus.
Read the summary
The night before, or ten minutes before.
Record and press
Allow the mic. Then space, S and X.
Don't skip your lecture on Monday!
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