IELTS Writing: How to Score Band 8 in Coherence and Cohesion

Coherence and Cohesion (CC) is one of the four criteria used to assess your IELTS Writing, worth 25% of your total score. Yet it is perhaps the least understood criterion. Many candidates believe CC is simply about using linking words like "Furthermore" and "Moreover," but the reality is far more nuanced.

This guide explains what Coherence and Cohesion actually means, how examiners assess it, and what specific techniques will push your score to .

What Do Coherence and Cohesion Mean?

These are two distinct but related concepts:

Coherence

Coherence refers to the logical organisation and clarity of your ideas. A coherent essay has:

• A clear overall structure
• Ideas that progress logically from one to the next
• Each paragraph focused on a single main idea
• An argument that builds toward a conclusion

Cohesion

Cohesion refers to the linguistic devices that connect your ideas. These include:

• Linking words and phrases (however, furthermore, consequently)
• Reference words (this, these, such, the former, the latter)
• Substitution (using "do so" instead of repeating a verb phrase)
• Lexical cohesion (repeating key terms or using synonyms)

Band Descriptors for CC

Understanding what each band level requires helps you target improvements:

• Band 6: Information and ideas are generally arranged coherently. There is clear overall progression. Cohesive devices are used effectively but may be faulty or mechanical.
• Band 7: Information and ideas are logically organised with clear progression throughout. A range of cohesive devices is used appropriately, though there may be some under-use or over-use.
• Band 8: Ideas are sequenced logically. Each paragraph has a clear central topic. Cohesion is managed well with skillful paragraphing. Rarely draws attention to cohesive devices.

The critical difference between Band 7 and Band 8 is that at Band 8, your linking feels invisible — the reader follows your argument without noticing the connectors.

Technique 1: Strong Topic Sentences

Every body paragraph should begin with a topic sentence that tells the reader what the paragraph is about. This is the single most important technique for coherence.

Weak Topic Sentences

• "There are many reasons for this." (Vague — what reasons?)
• "Another point is that education is important." (Too generic)
• "I will now discuss the other side." (Meta-commentary, not content)

Strong Topic Sentences

• "The most compelling argument for early language education is the neurological advantage that young learners possess."
• "However, financial constraints represent a significant barrier to implementing this approach."
• "From an environmental perspective, the disadvantages of urban expansion are equally concerning."

Each strong topic sentence:

• Previews the specific content of the paragraph
• Contains the main idea
• Connects logically to the essay question

Technique 2: Logical Paragraph Structure

Each paragraph should follow a predictable internal structure:

1. Topic sentence — States the main idea
2. Explanation — Develops the idea further
3. Evidence/Example — Provides support
4. Link — Connects back to the main argument or transitions to the next point

Example

Topic: "One significant advantage of remote working is the improvement in work-life balance."

Explanation: "When employees are freed from daily commutes that may consume one to two hours, they can redirect this time towards personal activities, exercise, or family commitments."

Evidence: "Studies conducted in several European countries have found that remote workers report 23% higher satisfaction with their personal lives compared to office-based counterparts."

Link: "This enhanced wellbeing, in turn, tends to improve employee motivation and productivity."

This TEEL structure (Topic, Explanation, Evidence, Link) creates paragraphs that are internally coherent and connect smoothly to the next paragraph.

Technique 3: Using Cohesive Devices Skillfully

The Problem of Over-Use

Many candidates at Band 6 use too many linking words, making their writing feel mechanical:

"Firstly, education is important. Furthermore, it helps people find employment. Moreover, educated citizens contribute to economic growth. In addition, education reduces inequality. Additionally, it promotes social cohesion."

Every sentence starts with a connector, creating a robotic rhythm that draws attention to the devices rather than the content.

The Band 8 Approach

At Band 8, cohesive devices are varied and unobtrusive:

"Education plays a fundamental role in personal and economic development, equipping individuals with the skills needed to secure meaningful employment. Beyond individual benefits, a well-educated population drives economic growth and innovation. Perhaps most significantly, education serves as one of the most effective tools for reducing social inequality, enabling individuals from disadvantaged backgrounds to improve their circumstances."

Notice how the linking is achieved through:

• The logical flow of ideas (individual → societal → most important)
• Reference ("Beyond individual benefits" refers back to the previous sentence)
• Evaluative language ("Perhaps most significantly" shows the writer is ranking points)
• Only one traditional linking phrase in three sentences

Technique 4: Reference and Substitution

These are powerful cohesion tools that many candidates underuse:

Demonstrative Reference

• "Many governments have increased taxes on sugary drinks. This measure has proven effective in several countries."
• "Students are under enormous pressure to achieve high grades. Such pressure can have serious consequences for mental health."

Pronoun Reference

• "Renewable energy is growing rapidly. It now accounts for 30% of total electricity generation."

Substitution

• "Some argue that traditional classrooms are more effective, while others believe the opposite."
• "Developed countries have invested heavily in infrastructure, and developing nations should do the same."

Comparative Reference

• "The first approach focuses on prevention. The latter, by contrast, emphasises treatment."
• "Urban areas recorded higher levels than their rural counterparts."

Technique 5: Thematic Progression

This advanced technique involves starting each new sentence with information that connects to the previous sentence, then adding new information:

Example of poor thematic progression: "Traffic congestion costs billions of dollars annually. Children in cities suffer from respiratory problems. Governments should invest in public transport."

Each sentence introduces a completely new subject with no connection to the previous one.

Example of strong thematic progression: "Traffic congestion costs billions of dollars annually. These economic losses are compounded by the health impacts on urban residents, particularly children who suffer from respiratory problems linked to vehicle emissions. Addressing this multifaceted problem requires significant government investment in public transport infrastructure."

Each sentence picks up information from the previous one (economic losses → health impacts → addressing the problem) and adds new information, creating a chain of connected ideas.

Before and After Examples

Example 1: Task 2 Body Paragraph

Before (Band 6): "Firstly, technology is good for education. Students can learn online. Furthermore, they can access many resources. Moreover, teachers can use technology to make lessons interesting. In addition, technology helps students who live far from schools."

After (Band 8): "Technology has transformed educational access and quality in several important ways. Students are no longer confined to textbooks and classroom lectures; online platforms provide access to a vast array of learning resources, from interactive simulations to university-level courses. For educators, digital tools enable the creation of more engaging and personalised lessons, while students in remote areas — who may previously have had limited educational opportunities — can now participate in high-quality learning through virtual classrooms."

Example 2: Task 1 Body Paragraph

Before (Band 6): "In 2010, oil was 40%. Then in 2020, it went down to 30%. Also, coal went down. It was 30% and then 20%. However, renewable energy went up from 10% to 25%."

After (Band 8): "The most significant change between 2010 and 2020 was the declining dominance of fossil fuels. Oil's share fell from 40% to 30%, while coal experienced an even sharper contraction, dropping from 30% to just 20%. This combined decline of 20 percentage points was largely offset by the growth of renewable energy, which more than doubled its share from 10% to 25% over the same period."

Practice Plan

1. Analyse model essays — Read Band 8-9 sample essays and highlight the cohesive devices used. Notice how few traditional linking words appear.
2. Practice topic sentences — Write topic sentences for 10 different essay paragraphs without writing the full essay. This builds your planning skills.
3. Revise for over-linking — Write an essay, then go through it removing every unnecessary linking word. If the text still makes sense, the connector was not needed.
4. Get structured feedback — CambPrep's writing practice provides specific feedback on coherence and cohesion, identifying both over-use and under-use of cohesive devices.
5. Read your work aloud — If a sentence sounds stilted or mechanical, it probably has a cohesion problem. Revise until it flows naturally.

For a comprehensive assessment of your writing coherence alongside other criteria, take a level test and review your detailed score breakdown.

Frequently Asked Questions

Is it true that using "Firstly, Secondly, Finally" is too basic for Band 7+?

Not necessarily. These are perfectly acceptable organisational markers when used appropriately. The problem arises when they are your only cohesive devices. At Band 7+, you should use a variety of connectors and also rely on logical flow, reference, and thematic progression.

How many paragraphs should a Band 8 essay have?

For Task 2, four or five paragraphs is standard: introduction, 2-3 body paragraphs, and a conclusion. For Task 1, four paragraphs: introduction, overview, and two body paragraphs. The number matters less than the clarity and focus of each paragraph.

Can paragraphing alone improve my CC score?

Yes, significantly. Clear paragraphing with focused topic sentences can move you from Band 6 to Band 7 in CC even without changing your linking words. Many candidates write very long paragraphs that contain multiple ideas — simply splitting these into focused paragraphs is an immediate improvement.

What is the biggest CC mistake at Band 6?

The most common Band 6 characteristic is mechanical use of cohesive devices — starting every sentence with a linking word and using them formulaically. The fix is to reduce your reliance on explicit connectors and let your ideas flow logically from one to the next.