How to structure an online course: chapters and lecture length

Most people start building a course by opening a document and listing everything they know about the subject. The list gets long, the course gets long, and students stop halfway. A good structure works the other way round. It starts from what the student should be able to do at the end, and includes only what gets them there.

This guide goes through the planning in order: the outcome, the chapters, the lectures inside them, how long each one should be, and how to test the structure before you record everything.

Step 1: write the outcome in one sentence

Before any chapters, write down what the student will be able to do when they finish. Make it something you could see them doing. "Understand photography" is too vague. "Take clear, well-lit portraits with a phone and edit them in a free app" is something a student can check for themselves.

That sentence decides what goes in and what stays out. Every lecture you plan should bring the student closer to it. If a lecture is interesting but doesn't, it belongs in a bonus section, a blog post or a different course.

It also helps to describe the student at the start: what they already know, what they have (equipment, software, time), and what they've probably tried before. A course for complete beginners and a course for people with a year's experience need very different first chapters.

Step 2: break the path into chapters

Think of the course as a path from where the student is now to the outcome. Chapters are the stops along the way. Each chapter should end with the student able to do something they couldn't do before, even if it's a small step.

A simple way to find the chapters:

1. Write the outcome at the bottom of a page.
2. Ask what the student needs to be able to do just before that. Write it above.
3. Keep going upward until you reach where the student starts.
4. Group the steps into four to eight chapters with clear names.

Name chapters by what the student achieves, not by the topic. "Getting the light right" tells a student where they're going. "Lighting" just tells them what it's about.

Put an early win in the first chapter. A student who gets a real result in the first hour is more likely to keep going than one who spends the first chapter on background and theory. More on that in how to get students to finish a course.

Step 3: one lecture, one idea

Inside each chapter, split the content into lectures. The rule that makes the biggest difference is simple: each lecture teaches one thing. One technique, one concept, one task.

When a lecture covers one thing, it has an obvious title, a student can find it again later, and it's easy to re-record if something changes. When a lecture covers four things, students lose track of what they learned and can't find the part they need.

How long should a lecture be?

There's no fixed number, but shorter is almost always easier to finish. Many course creators aim for lectures somewhere around five to fifteen minutes. A student can watch one on a break, finish it, and feel progress. A forty-minute lecture needs a free evening, and those are rare.

Some practical guidelines:

• If a lecture runs long because it covers several ideas, split it.
• If it runs long because the task genuinely takes time, like a full walkthrough of a project, keep it whole but tell students up front how long it is.
• Cut the warm-up. Start each lecture with what it's about, not with a greeting and a recap of the whole course.
• Don't stretch a lecture to look more substantial. Students value a course by what they can do afterwards, not by the total hours.

The same goes for the whole course. A focused course that students finish is worth more to them, and to you, than a long one they abandon.

Inside each lecture

A structure that works for most lectures:

1. One or two sentences on what this lecture covers and why it matters.
2. The explanation or demonstration.
3. A short example, ideally a real one.
4. A task: something the student does before moving on.

The task is what turns watching into learning. It can be small: take three photos, fill in a template, write one paragraph. Without it, many students watch the whole course and still can't do the thing.

Video doesn't have to carry everything. Add text under the video for the key points, so students can scan them later. Attach files they'll need: templates, checklists, worksheets. Short quizzes at the end of a chapter help students see what they've understood, and they help you see where the course isn't clear. We go into this in course quizzes and certificates.

Order and pacing

Decide how students move through the course. There are three common options:

• Everything open from the start. Good for reference-style courses, where students jump to what they need.
• One lecture after another, each opening when the previous one is done. Good when each step depends on the last.
• A new lecture every few days. Good when you want students to practice between lectures, and it gives them a regular reason to come back.

Whichever you choose, make the first lecture or two available as a free preview on the course page. It shows a potential student how you teach, which a description can't do. That matters when you come to sell the course.

Test before you record everything

Recording a full course is a lot of work, so check the structure first. Show the chapter and lecture list to a few people from your audience and ask what's missing and what they'd skip. Better still, record the first chapter and let a small group go through it. Watch where they get stuck and what they ask.

Another option is to teach the material live first. A webinar or a short live series gives you real questions from real students, and the recordings can become the first draft of the course. See turning a webinar into a course.

Try it without committing

Courses on Kolcast are built from chapters and lectures, with video, text and files to download in each one, and you choose whether lectures are all open, one after another, or a new one every few days. You can start with a free course of up to three lectures, and a webinar's recording can become a lecture in one click. More on the courses page and the plans.