Stand at the back of your own classroom during someone else's lesson and look at the projector. From row six the body text is a grey smear, the code sample is unreadable, and the moment the sun comes out the top half of the slide is gone. The projector is the one screen in the room that everyone depends on and nobody can see properly.
Meanwhile there are thirty perfectly good screens in the room, in the students' pockets. The obvious move is to put the slide on them. The less obvious part is doing it without losing the class.
What changes when the slide is in their hand
The first lesson with the slides on the students' phones feels different in three ways, and only one of them is about reading.
- Everyone sees the same thing, properly. The code sample is legible. The diagram is zoomable. The student at the back is on the same footing as the one at the front, and the student who forgot their glasses stops pretending.
- You are no longer tied to the front. If the control screen is on your phone, you can advance the slide from the back row, stand next to the group that is stuck, and teach the whole room from wherever the room needs you. The projector becomes optional: nice in a dark hall, irrelevant in a bright lab.
- Copying off the board stops. In a computer lab the commands and code blocks arrive on the student's screen as text they can select and paste. Half the "it doesn't work" hands go down, because half of them were typos.
Keeping the pace in your hands
The worry every teacher raises is the same: if the deck is on their phone, they will read ahead and stop listening. It is a fair worry, and the answer is in how the slides are shared.
A shared deck in a file is a hand-out: students read it at their own pace, which is fine for revision and bad for a lesson. A deck that follows the teacher is different: the student sees the slide you have open, can look back at the ones you have already shown, and cannot open the ones you have not. When you move on, their screen moves with you. That is the model ClassTogether uses, and it keeps the lesson teacher-paced while every student has the slide in front of them.
The late arrival is handled the same way: a student who joins at 9:20 lands on the slide that is open at 9:20 and can scroll back through what they missed, quietly, without asking.
A pointer the whole class can see
The laser pointer was the one thing the projector did that phones could not: "look at this line". It turns out to be the easiest thing to carry over. With the slide on every screen, your pointer can be drawn at the same spot on every screen, and a line of text you highlight stays highlighted for everyone, including the student who joins late. "The third line of the query, here" works again, and it works for the back row.
Two habits make it useful rather than distracting: point for a reason, and leave highlights only on the lines you will come back to. A slide with six highlights is a slide with none.
Exercises with the hints in the deck
The place where phone-in-hand slides pay off most is the exercise. On a projector, the task is on the board and the hint is you, walking between desks and repeating the same nudge eleven times. When the slide is on the student's screen, the hints can be in the deck: a student who is stuck takes the first hint on their own, then the second, and asks you only when the hints run out. You see on your panel how many have taken which hint, which tells you where the room is without a show of hands. For a class that leans on the hints too early, you keep them locked and release them yourself.
Getting started without a project plan
- Export the deck you already have as a PDF. Every tool worth using takes a PDF; you do not need to rebuild anything.
- Put the join code on the board at the start, once. Students type it, enter a name, and keep the page open for the whole lesson.
- Keep the projector on for the first few lessons, then try one without it. Notice where you stood.
- Add one exercise slide with two hints and see how far the class gets before the first hand goes up.
The projector is not the enemy; it is just the weakest screen in the room. Use it for the join code and the quiz podium, and teach from the thirty screens that work.