Maths without screenshots
Write LaTeX between dollar signs. KaTeX renders it at build time, and an aligned block can light up one line per click.
Use cases / Lectures and teaching
Slides for lectures and teaching
Equations typeset at build time and revealed a line at a time, a quiz the class answers from their phones, and the notes left on the slides for students to read afterwards.
Why it fits
What Kadal Deck gives you here
Check understanding as you go
A timed quiz with a leaderboard, a poll, or a word cloud; students answer on their phones without an app or an account.
Notes for after class
audienceNotes: true shows each slide's notes to students who open the deck later, so the slides make sense without you.
Free for a class
The free plan covers public decks and a room of 25. Bigger lecture halls need Starter (100) or Pro (500).
The deck
A real one, ready to copy
A week's lecture: a title, two equations that appear one per click, and a 30-second quiz. It passes kadal-deck check as it stands.
---
title: Signals and systems, week 4
theme: lecture
audienceNotes: true
---
# The Fourier series
Any periodic signal is a sum of sines
---
## From one period to the coefficients
$$ {1|2|all}
\begin{aligned}
a_n &= \frac{2}{T}\int_0^T x(t)\cos(n\omega_0 t)\,dt \\
b_n &= \frac{2}{T}\int_0^T x(t)\sin(n\omega_0 t)\,dt
\end{aligned}
$$
<Notes>Derive a_n on the board first. [click] b_n is the same with a sine. [click] Both together.</Notes>
---
## Check yourself
<Quiz
id="week4"
question="A square wave contains which harmonics?"
options={["Even only", "Odd only", "All of them", "None"]}
correct={1}
seconds={30}
/>Step by step
From an empty folder to the room
-
Write the week's deck
One deck.mdx per lecture, in the same repository as the course notes.
-
Teach from the presenter view
Open the quiz when you reach it; the leaderboard updates as answers come in.
-
Publish it for the class
Students get a link that works on a phone, with your notes under each slide.
npx kadal-deck publishpnpm exec kadal-deck publishyarn kadal-deck publishbunx kadal-deck publish -
Hand out a PDF
Export one page per click step, or one per slide, for students who want to print.
Read next
In the docs
Other uses: Slides in Markdown · Conference talks · Pitch decks · Team demos and reviews · Workshops