How to Structure a 90-Minute Lesson So Learners Stay Engaged

A 90-minute lesson does not mean the teacher should explain for 90 minutes.

The teacher should plan different activities that give learners opportunities to listen, think, answer, practise, discuss, apply and receive feedback.

Here is one practical way to structure the lesson.

1. 10 minutes — Introduce the topic.

What to do:

Tell learners clearly what they are expected to learn.
Connect the new topic to something they already know.
Use a familiar example, situation, object or question.
Ask 2–3 questions to find out what they already know.
Introduce only the part of the topic you are ready to teach.
Avoid spending the entire 10 minutes talking.
For example:
If you are teaching fractions, don’t begin immediately with a definition.
Ask:
“If four children share one pizza equally, what fraction of the pizza will each child get?”
Allow them to answer.
Then connect their answers to the lesson.
The goal: Get their minds into the lesson before giving them too much information.

2. 15 minutes — Teacher demonstration.

This is where you show them how something is done.
Don’t just tell them.

Explain one step at a time.
Give an example.
Work through the example in front of them.
Explain why you are taking each step.
Ask short questions while demonstrating.
Stop occasionally and ask learners what should happen next.
Use the board, textbook, object, diagram or practical materials where appropriate.
Avoid demonstrating five different examples without allowing learners to participate.
For example, in Mathematics:
Don’t simply write:
2x + 3 = 11
and solve it silently.
Say:
“What do we need to remove first?”
Allow responses.
Then demonstrate the step.
“Why did I subtract 3 from both sides?”
Again, let them respond.
The goal: Learners should follow your thinking, not just copy your answer.

3. 10 minutes — Questions.

This is where you find out whether learners are actually following.
And this is where many teachers make a mistake.
They ask:
“Do you understand?”
Most learners will say:
“Yes, sir.”
or
“Yes, ma.”
That answer tells you very little.
Instead, ask questions that require learners to show their understanding.
Ask:
“What is the first step?”
“Why did we do that?”
“What would happen if we changed this?”
“Which answer is correct? Why?”
“What mistake did I make here?”
“Can you explain this in your own words?”
“Can you give me another example?”
Also:
Don’t allow only the fastest students to answer.
Give everyone a chance to think.
You can say:
“Everybody, think about this for 20 seconds before anyone answers.”
Then ask for responses.

The goal: Find out what learners understand before moving on.

4. 15 minutes — Individual or pair activity.

Now the learners should do the work themselves.
This is important.
A learner watching you solve five examples is not the same as a learner solving one independently.

Therefore,

Give learners a clear task.
Give them enough information to begin.
Tell them exactly what they should produce.
Allow them to work individually or in pairs.
Move around the classroom.
Observe what they are doing.
Listen to their discussions.
Identify learners who are struggling.
Don’t immediately give the answer when someone struggles.
Ask guiding questions instead.
For example:
“What have you done so far?”
“Which part is confusing you?”
“Look at the example we did together. What was the first step?”

The goal: Move learners from watching the teacher to doing the work themselves.

5. 10 minutes — Check answers.

Don’t simply say:
Submit your note for marking.

Do this instead.:
Ask learners to compare their answers.
Let different learners explain how they arrived at their answers.
Put selected answers on the board.
Discuss differences in answers.
Ask learners to explain their reasoning.
Identify common mistakes.
Correct mistakes immediately where necessary.
Praise correct thinking, not just correct answers.
If three learners give different answers, don’t just say:
“The correct answer is B.”
Ask:
“Why did you choose A?”
Then:
“Who got B? How did you arrive at it?”
This allows you to discover where the misunderstanding occurred.

The goal: Turn mistakes into information about what needs to be taught again.

6. 15 minutes — Application.

This is where learners use what they have learnt in a new situation.
Because a learner can reproduce an example from the board without actually understanding the idea.

What you should do.
Give them a question or situation that is slightly different from the example you demonstrated.
For example:
You taught:
2x + 3 = 11
Don’t give only:
3x + 2 = 14
Give them something that requires them to think about the same idea differently.
Ask:
“A shopkeeper bought an item for ₦2,000 and sold it for ₦2,500. What was the profit?”

Or in another subject, give them a real-life situation where they have to apply the concept.

The goal: Find out whether learners can use the knowledge, not merely repeat it.

7. 10 minutes — Correction and clarification.

This part is particularly important.
You have now seen their work.
So don’t continue teaching as if everyone understood.
Use what you observed.

What to do?
Identify the most common mistake.
Explain the mistake again in a simpler way.
Demonstrate the correct approach.
Use another example if necessary.
Ask learners who made the mistake to try again.
Allow learners to correct their own work.
Pay attention to misconceptions that may affect future lessons.
For example:
“I noticed that many of you subtracted 4 from one side but did not subtract it from the other side. Let’s look at why both sides must be treated equally.”
Then demonstrate it again.

The goal: Don’t leave today’s misunderstanding to become tomorrow’s bigger problem.

8. 5 minutes — Quick learning check.

Don’t allow the bell to be the thing that tells you whether learning happened.
Use the final few minutes deliberately.
Give learners something short that they must complete without your help.

It could be:
one question;
one calculation;
one short explanation;
one example;
a diagram to label;
a problem to solve;
“Write one thing you learnt today.”
“What is the difference between X and Y?”
“Explain this concept in two sentences.”

The goal: is to get evidence of what learners can do at the end of the lesson.

But there is something important here.
These timings are not a rigid formula.
You may need:
5 minutes for introduction;
20 minutes for demonstration;
20 minutes for practice;
15 minutes for discussion;
20 minutes for application;
10 minutes for checking.

It depends on the subject, topic, age of the learners and what you want them to achieve.

The important thing is that the teacher should not be doing the same thing for 90 minutes.

Because your learners can sit in your classroom for 90 minutes.
But your responsibility is to make sure those 90 minutes are filled with opportunities for them to think, respond, practise, apply, make mistakes, receive feedback and improve.

A 90-minute lesson should be a 90-minute opportunity for learning and not a 90-minute speaking slot for the teacher.