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Author note: I teach ESL in China and built SyllabixMark after seeing how often fluent essays still break down on structure, progression, and feedback clarity.

Some IELTS essays are easy to admire on a first read.

The vocabulary is confident. The grammar is mostly under control. The paragraphs are neatly separated. The student sounds like they know what they are doing.

And yet the score comes back as Band 6 for Coherence and Cohesion.

If you teach IELTS writing, you have probably seen this more than once. A student writes something that feels polished, but the result still stalls. The natural reaction is to focus on grammar or vocabulary. In many cases, though, that is not where the real problem is.

The real issue is that fluency and coherence are not the same thing. IELTS examiners are not rewarding a script just because it sounds smooth. For Coherence and Cohesion, they are looking for logical organisation, clear progression, and cohesive devices that support meaning rather than mechanically decorate the page.

What Band 6 actually means

The public IELTS band descriptors are useful here because they show exactly where many “good-sounding” essays get trapped.

At Band 6, a student may arrange information and ideas coherently and show an overall progression, but that progression may not always be logical, and cohesive devices may be used effectively only in part or may become faulty or mechanical. At Band 7, the writing must logically organise information and ideas and show clear progression throughout, while cohesive devices are used appropriately, even if there may still be some overuse.

That difference matters.

A Band 6 essay can still look organised. It can have paragraphs. It can have linking words. It can sound controlled sentence by sentence. But the examiner is asking a stricter question: Can I follow the logic without having to fill in the gaps myself?

A fluent essay can still be structurally weak.
In IELTS Writing, “sounds smooth” is not the same as “progresses logically.”

Why fluent essays still plateau

This is the trap I see most often.

Students learn how to produce a recognisable essay shape. They use introduction, body paragraphs, conclusion. They add connectors like “Firstly,” “Moreover,” and “In conclusion.” They write in a tone that feels academic.

But underneath that surface, the argument may still be shallow.

Usually, one of three things is happening:

• The essay is listing points instead of developing one.
• The paragraphs are related, but not truly building on each other.
• The cohesive devices are visible, but not doing real logical work.

That is why some essays feel better than they score. They give the impression of organisation, but the underlying progression is weak.

“The writing moves forward physically, but not logically.”

The difference between listing and developing

If I had to reduce this whole issue to one teaching distinction, it would be this:

**Band 6 writers often list.
Band 7 writers develop.**

A Band 6 paragraph often introduces several relevant points very quickly. The student shows range, but not depth. The paragraph moves sideways, not inward. It keeps adding new content without fully explaining why any one point matters.

A stronger Band 7 paragraph usually does less, but does it better. It makes one clear claim, explains it, supports it, and stays focused long enough for the reader to feel the logic unfold.

That is why more ideas do not automatically improve Coherence and Cohesion. In fact, more ideas often make the structure weaker.

Teaching shortcut:
If a paragraph is trying to do three jobs at once, it is usually doing none of them well.

A faster way to diagnose the problem

When a script feels fluent but still seems structurally weak, I use a very simple method: reverse outlining.

Here is the process:

1. Read the essay once.
2. Write one sentence describing what each paragraph actually does.
3. Read those paragraph summaries in order.

If those summaries do not create a clear logical progression, the coherence problem becomes visible almost immediately.

This is useful because many students — and teachers — are distracted by sentence-level fluency. Reverse outlining forces you to step back and look at the architecture of the essay instead of the polish of individual lines.

For example, if paragraph 2 and paragraph 3 are both just listing advantages, the essay may feel organised without actually progressing. If the conclusion introduces a new point instead of consolidating the argument, the progression breaks again. If one paragraph drifts away from the claim it began with, the reader feels the structure weaken even if the grammar remains strong.

Three Coherence and Cohesion faults worth teaching

You do not need a huge technical framework to improve this criterion. In practice, I think three fault types are enough.

1. Mechanical linking

This is the overuse of obvious connectors without enough control over the relationship between ideas. IELTS explicitly notes that at Band 6, cohesive devices may become faulty or mechanical.

The problem is not the existence of words like “Firstly” or “Moreover.” The problem is when they function as decoration rather than logic.

2. Weak paragraph progression

This is when a paragraph starts with a clear point but then drifts into loosely related ideas. The student adds content, but the paragraph does not deepen or move the argument forward in a meaningful way.

3. Unclear referencing

This happens when words like “it,” “this,” “they,” or “these” do not clearly point to one thing. That small ambiguity can damage clarity quickly, especially in an otherwise fluent script.

These categories help because they make feedback concrete.

Instead of saying, “Improve your cohesion,” you can say:

• “This paragraph is listing instead of developing.”
• “These connectors feel mechanical.”
• “This reference is unclear.”

That is much easier for a student to act on.

What Band 7 looks like in practice

Band 7 Coherence and Cohesion is not about sounding formal or complicated.

It is about making the essay easier to follow.

The paragraphing feels purposeful. The argument develops in a visible direction. The connections between ideas are clear. The linking language supports meaning instead of announcing structure too loudly.

In practical terms, stronger Band 7 writing usually shows:

• one-job paragraphs,
• clearer topic progression,
• better control of sentence-to-sentence relationships,
• less dependence on repetitive connectors,
• and fewer moments where the reader has to pause and infer what the student meant.

Band 7 is not “more advanced English.”
It is often just more disciplined structure.

How I would teach this on Monday

If you want a simple classroom or feedback routine, I would start here:

• Teach one-job paragraphs. Each paragraph should do one clear thing and do it fully.
• Use reverse outlines in feedback. Show students the actual progression of their essay.
• Challenge decorative linking. Ask whether each connector is doing real logical work.
• Prioritise development over quantity. One developed point usually beats four shallow ones.

This matters even more when you are marking at speed. After enough essays, weak structural habits start to look normal. That is one reason Coherence and Cohesion can be tiring to grade well: the problems are often subtle, and they are easy to miss when you are fatigued.

Where AI can help teachers

This is one place where AI-assisted marking can be genuinely useful.

Not because a machine should replace teacher judgment. It should not.

But software can help flag patterns that are easy to miss in a large stack of essays: overused connectors, repeated paragraph functions, unclear references, and weak progression signals. Those patterns are repetitive to hunt for manually, especially late in a grading session.

That is how I think about SyllabixMark.

The goal is not to hand writing assessment over to AI. The goal is to reduce the mechanical scan so the teacher has more energy left for the part that matters most: diagnosing the real problem and explaining it clearly.

AI should not replace the teacher’s judgment.
It should protect it from fatigue.

Final thought

A fluent IELTS essay is not automatically a coherent one.

That is why some students stay stuck at Band 6 even when their grammar and vocabulary seem strong. They have learned how to produce an essay that looks finished, but not always one that progresses logically enough for a higher score.

If you are seeing polished essays that never quite break through, Coherence and cohesion are often where the real story is.

And in many cases, the fix is not more linking words.

It is better paragraph discipline, better logical progression, and feedback that focuses on structure rather than surface fluency.

Try this with your next five essays

Before you write feedback, create a one-sentence reverse outline for each paragraph.

If the paragraph summaries do not build a clear argument, you have probably found the real reason the essay is stuck at Band 6.

If you want a faster way to spot mechanical linking, weak progression, and unclear referencing, try SyllabixMark on a small batch of essays and compare what it flags against your first read.