Learning how to make presentations with AI takes about 20 minutes — and the result is a decent first draft of your slides, not a finished presentation. AI is good at turning an outline into slides. It is not good at knowing what matters to your audience, which slide needs a picture, or whether your talk makes sense out loud. That part is yours.
This guide shows the four steps: write the outline first, generate the slides, fix the design, and practise the talk. It works with Gamma, Canva, or Copilot — pick the one you already have.
What you need before you start (2 minutes)
Have these three things ready:
- Your outline or notes — the ideas for your talk, in order. If you do not have an outline, write one first: one idea per slide, eight slides maximum for a short talk.
- A tool — Gamma (free plan, fastest for first drafts), Canva (free plan, best design control), or Copilot (needs Microsoft 365, works inside PowerPoint).
- Twenty minutes — ten to generate the slides, ten to fix them and practise.
If you have never used any of them, start with Gamma — it turns an outline into slides in one step. Move to Canva later if you want more control over the design.
Step 1: Write the outline first (5 minutes)
Never let AI decide what your talk is about. Write the outline yourself — or ask AI to turn your notes into an outline:
Check the outline before you continue. Does it flow? Does each slide have one idea? Is anything missing — or anything that does not belong? Fix the outline now, because every mistake in the outline becomes eight mistakes in the slides.
A good outline for an 8-slide talk looks like this: title slide, the problem, why it matters, three main points (one slide each), what to do next, and a closing slide. One idea per slide, no exceptions.
Step 2: Generate the slides (5 minutes)
Paste your outline into the tool:
- Gamma: paste the outline, pick a theme, and click Generate. Gamma builds the slides with text and images in about a minute.
- Canva: use Magic Design — paste your outline or describe the presentation, pick a style, and Canva builds a draft deck you can edit.
- Copilot: in PowerPoint, open Copilot and ask it to create a presentation from your outline or from a Word document.
The first draft will look impressive — and it will have problems. That is normal. The next step is where the presentation actually gets good.
Step 3: Fix the design (5 minutes)
Go through the slides one by one and fix these five things:
- One idea per slide. If a slide has six bullet points, split it or cut three. Your audience reads the slide instead of listening to you when there is too much text.
- Big text, short lines. If you cannot read a slide from the back of the room, the text is too small. Shorten the bullets — five words is better than fifteen.
- Remove clutter. Delete the decorative graphics, the extra icons, and the stock photos that add nothing. A clean slide beats a busy one.
- Check the images. AI-generated images can look wrong — extra fingers, misspelled words, strange faces. If an image looks off, replace it with a real photo or delete it.
- Check the contrast. Light text on a light background is unreadable. Dark text on a dark background is worse. Pick a theme where the text is easy to read from far away.
Step 4: Practise the talk (5 minutes)
Slides are not the presentation — you are. Ask AI for speaker notes:
Then rehearse out loud, with a timer. A talk you have never said out loud will be too long, too fast, or both. Time it, cut what does not fit, and say the hard parts twice. If you stumble on a slide, the slide is the problem — simplify it, do not memorize it.
A complete example
Here is a talk filled in, so you can see what “specific” looks like:
The outline becomes: title slide, the problem (what we throw away), why it matters, what other schools do, our plan (three steps), what it costs, what we need from you, closing. Gamma builds the slides. You fix the design — one idea per slide, big text, real photos of the school bins instead of AI images. Then you write speaker notes and rehearse once, out loud, with a timer. Total time: about 20 minutes. The same steps work for any talk — a class presentation, a work update, a project pitch. Change the notes, and the steps stay the same.
Common mistakes to avoid
- Letting AI write the whole talk. If you do not know the talk, you cannot present it. Write the outline yourself, and know every point on every slide.
- Too much text on slides. Slides are for the audience to look at, not to read. If a slide has a paragraph, cut it to three short bullets.
- Trusting AI images. AI images look good at first glance and wrong on second glance. Check every image, and use real photos when they matter.
- Never rehearsing. A talk you have not said out loud is a talk you have not prepared. Rehearse once, with a timer, before the real thing.
- Using the default theme without checking it. Default themes can have poor contrast and tiny text. Check readability from the back of the room — or at least from across your desk.
FAQ
Is Gamma free?
Yes — Gamma has a free plan with limits on how many decks you can create and how many AI credits you get. For a student or teacher making a few presentations a month, the free plan is enough.
Canva or Gamma — which is better?
Gamma is faster for a first draft: paste an outline, get slides. Canva gives you more design control: you can change everything, but it takes longer. Use Gamma to start, Canva to polish.
Can I use it for school?
Yes — but check your teacher’s rules. Present your own words and your own ideas. AI can build the slides; the talk is yours.
Do I need PowerPoint?
No. Gamma and Canva run in the browser and export to PDF or PowerPoint format. Copilot needs Microsoft 365 and PowerPoint.
