When a Lesson Still Feels Fuzzy: Find the Exact Part You Have Not Understood

It made sense a moment ago. Can we find the exact point where it became unclear?

Maybe you watched part of a lesson on your phone while riding a KRL train, waiting for a bus, or sitting at home after school or work.

While the explanation was playing, every step seemed to fit. Once the screen is closed, however, one piece may be hard to say in your own words.

Sometimes one term has no clear meaning. Sometimes the terms are clear but the reason between two steps is missing. Sometimes the rule works in the example, but you do not know its limit.

All three can feel like one big fog.

They need different fixes.

Let’s find which kind of gap is in front of us

• Let’s see whether an important word is still only a familiar label.
• Let’s see whether we can explain the bridge between two steps.
• Let’s see whether we know the condition that makes the rule stop working in the same way.

1. Check whether an important word is still only a label

One unclear term can make a whole lesson feel harder than it really is.

You may recognise the word from a school slide, a campus module, or an office training video. Yet when you try to explain it without repeating the same word, the meaning may disappear.

That is a meaning gap: the label looks familiar, but the idea behind it is still blurry.

A related effect was studied by psychologists Leonid Rozenblit and Frank Keil. They called it the illusion of explanatory depth: we may feel that our understanding is detailed until we actually have to explain how something works. Their 2002 research used familiar systems and devices rather than online lessons, so we should not use it to explain every learning difficulty. The narrower lesson is useful here: putting an explanation into your own words can expose a limit that simple familiarity did not show. (Rozenblit & Keil, 2002)

A useful check is:

Can I explain the important word without using the same word again?

Imagine that you are learning percentage change from a maths lesson, a bimbel tutoring worksheet, or a spreadsheet for a class project.

You can follow the formula, but “percentage change” still means little more than “the answer I get after doing the calculation.”

Try replacing the label with a plain sentence:

Percentage change tells me how large a change is compared with where I started.

Now the term has something concrete behind it. You can picture a starting value, a movement, and a comparison between the two.

Your whole topic may not be solved yet, but one hidden problem has become visible.

2. Check whether the missing part is the bridge between two steps

A different gap appears when the important words already make sense, but the logic between them does not.

You understand the first step and the second step separately. What you cannot say is why the first one leads to the second.

That is a connection gap.

Research on self-explanation gives us a useful reason to test this kind of gap. Self-explanation means trying to explain the material to yourself while you learn it. In a 1994 study, Michelene Chi and colleagues asked 14 eighth-grade students to explain each line of a text about the circulatory system as they read. Ten students in a comparison group read the same text twice without those prompts. The prompted group improved more from the test before reading to the test after reading. It was a small study in one subject, so it does not prove that self-explanation always improves learning. It supports the narrower idea that producing an explanation can help reveal and build links that reading alone may leave weak. (Chi et al., 1994)

Suppose you are checking a spreadsheet for a campus assignment, a student-organisation budget, or a simple personal expense record. A value rises from 80 to 100.

You know the amount of change is 20. You also know that the usual percentage-change calculation divides 20 by 80.

Then ask yourself:

Why 80?

If the only answer you have is “because that is the formula,” the missing piece is not another definition. It is the reason that connects the change to the starting value.

The bridge is:

We are comparing the size of the change with the value we started from.

So 20 divided by 80 is 0.25. The increase is 25%.

The calculation now has a purpose you can explain. A rise of 20 is one quarter of the starting value.

Instead of searching for another complete lesson, you now have a smaller question:

Why does this step follow from the one before it?

3. Check whether you understand the rule but not its limit

There is another gap that can hide behind a correct answer.

You know the words, and you can explain why the steps connect. But perhaps every example you have seen uses conditions where the rule works normally.

You do not yet know its boundary. A boundary is simply the point where a rule no longer works in the same way.

Use the same percentage-change idea, but imagine you are testing a spreadsheet before using it for a group project, a small online shop record, or stock notes for a warung you help with.

Suppose a value moves from 0 to 20.

The amount of change is 20. But the usual percentage-change calculation compares that change with the starting value, which would require dividing by 0.

Division by zero is undefined, so the usual formula cannot give an ordinary percentage change when the starting value is zero.

The earlier explanation was not wrong. You have found a condition where the usual rule needs different treatment.

That gives you a third question:

What can I change in this example that would make the rule stop working in the same way?

You do not need to collect every exception.

One clear edge can show whether you understand the rule itself or only remember a pattern that worked in the first example.

Three kinds of confusion need three different questions

These checks are most useful in this order because each one removes a different kind of uncertainty.

Start with meaning. If a key word is still empty, the later reasoning has nothing firm to stand on.

Then check the connection. If the words are clear but the link between two steps is missing, more definitions may not solve the problem.

Finally, check the limit. If the meaning and the link are clear, changing one condition can show whether you understand the rule beyond the example you were given.

This is a practical three-question check, not a scientific list of every possible learning problem. You may sometimes find more than one gap at the same time.

The useful change is that “I don’t understand” no longer has to remain one large problem.

“Which meaning is unclear?”

“Which link is missing?”

“Where does this rule stop working in the same way?”

Each question gives you somewhere specific to begin.

Move closer to the person you want to become

• Let’s pick one idea from a lesson, tutorial, or work task and explain its most important word in plain language.
• Let’s place two steps side by side and ask what makes the first lead to the second.
• Let’s change one condition in a small example and see whether the rule still works in the same way.

You do not need to prove that you understand the whole subject today.

We are only trying to locate the next missing piece clearly enough to work on it.

Once the gap has a name, the next question becomes easier to ask.