Share slides with students in three steps
Upload
Add the PDF you already have, or a Marp deck written in Markdown, to the lesson. If you use PowerPoint, Keynote or Google Slides, save it as a PDF first. A whole course folder can be imported from a git repository, pictures, quizzes and hand-outs included.
Share the code once
Students join by typing the 6-character code from the board or scanning the QR code. The code stays the same for the whole course.
Teach
The control screen shows the open slide, the next slide and the classroom tools together. When you move on, every screen changes at once.
The interactive presentation for students: what their screen shows
Back yes, ahead no
A student can go back to a slide they missed, but cannot open one you have not shown yet. When you move on, their screen follows you on its own; the slides stay in step with you, not with the fastest thumb in the room.
Your pointer is on their slide
Turn the pointer on and a dot or arrow appears at the same spot on every student's slide and on the projector. Highlight a line of text and it stays highlighted for everyone, including students who join later.
Code they can copy
Commands and code blocks in the slides arrive as selectable text. In a computer lab the typos from copying off the board disappear.
Exercise slides with hints
Mark a slide as an exercise and write up to ten hints and a solution into the deck. Students take hints one at a time on their own, or you release them to the whole class when the time is right; you see who has taken how many.
Ask the AI about the slide
When you allow it, a student can ask a question about the open slide from their own screen. The answer is based on that slide's text, goes to that student alone and is not stored. Your panel shows how many questions were asked.
Quiz and survey on the same page
When you start the quiz, the slide gives way to the question; when the quiz ends, the slide comes back. The student never has to tap anything, and the same page doubles as a student response system for polls and surveys.
A virtual teacher in the corner
An optional animated figure stands in a corner of the slide, follows your pointer and plays a reaction when you press a key. Students who find it distracting can hide it for themselves.
Late joiners are not lost
A student who arrives late lands on the slide that is open right now and can look back at the earlier ones.
Files to download
Attach notes and sample files to the lesson; students download them from their own screen during or after the class.
Which presentations can I upload?
PowerPoint, Keynote, Google Slides or Canva, it makes no difference: all of them save as PDF. Every page of the PDF becomes a slide and looks exactly as you designed it.
Marp (Markdown)
Decks written in Markdown with Marp upload directly. Code blocks stay selectable text on the student's screen instead of becoming a picture, and exercise slides with hints are written straight into the file.
A course folder from git
Keep a course in a GitHub or GitLab repository, one folder per module with the deck, its pictures, the quiz and the hand-outs, and import the whole thing in one go. After an edit, "Update from git" re-imports only the modules that changed.
Uploading your own deck is free. In most presentation software for teachers this is a paid feature; see the comparison if you are choosing.
Frequently asked questions
Can I upload my PowerPoint presentation?
Yes, save it as a PDF and upload that: File > Save As > PDF in PowerPoint, or Download as PDF in Google Slides and Keynote. Decks written in Markdown with Marp upload directly.
Can students skip ahead through the slides?
No. Students can look back at the slides you have already shown, but they cannot open a slide you have not reached yet. When you move on, their screen follows you.
Can students download the presentation afterwards?
When you allow it, yes. At the end of the lesson students download the slides and the files you attached from their own screen.
What does the AI answer, and who sees it?
A student can ask a question about the slide that is open; the answer, based on that slide's text, goes to that student only and is not stored. You switch the feature on per lesson, it is off by default, and the question count shows on your panel.
Do the slides stay in sync when a student's connection drops?
Yes. When the phone reconnects, the student's screen catches up with the slide you have open, and the highlights you made in the meantime are drawn on it. Nothing has to be refreshed by hand.
Is this online presentation software, or do I need to install anything?
It runs in the browser, for you and for the students. There is nothing to install on your laptop, on the classroom computer or on the students' phones; the only thing students type is the join code.
Read: teaching from the back of the room with live slides on every phone →