Academic Writing Task 1: Describing Data
From the IELTS curriculum
TL;DR
Academic Writing Task 1 asks you to describe visual data like charts or graphs in your own words. You need to identify key features, trends, and comparisons, presenting them clearly and logically. Aim for an overview, then detail, using appropriate vocabulary and grammar to hit Band 7.
1. The Mental Model
Think of yourself as a detective interpreting clues (data) from a picture (chart) and writing a report (your essay) for someone who hasn't seen the picture. You're not just listing numbers; you're explaining what they mean.
2. The Core Material
Academic Writing Task 1 (AW1) requires you to describe, summarise, or explain information presented in a visual format. This could be a bar chart, line graph, pie chart, table, process diagram, or map. You have about 20 minutes for this task and need to write at least 150 words.
To get a Band 7, you need to:
* Address all parts of the prompt: Make sure you cover what's asked.
* Present a clear overview: Summarise the main trends without details.
* Highlight key features: Select and report the most important information.
* Organise logically: Use paragraphs and linking words effectively.
* Use a range of vocabulary: Show you can describe changes, comparisons, and proportions.
* Use a variety of grammatical structures: Incorporate complex sentences accurately.
Structure of a Band 7 AW1 Response

Photo by Vadym Alyekseyenko on Pexels
A strong AW1 response usually follows this structure:
- Introduction (1 sentence): Paraphrase the prompt to introduce the chart.
- Overview (2-3 sentences): State the main trends or key features without using any numbers. This is crucial for a high score.
- Body Paragraph 1 (4-6 sentences): Detail the first set of key features or trends, using specific data.
- Body Paragraph 2 (4-6 sentences): Detail the second set of key features or comparisons, using specific data.
Language for Describing Data

Photo by Markus Spiske on Pexels
Describing Trends (Line Graphs)
- Increases: rose, climbed, grew, surged, an upward trend, a rise, an increase.
- Decreases: fell, dropped, declined, plunged, a downward trend, a fall, a decrease.
- Stability: remained stable, stayed constant, levelled off, remained unchanged.
- Fluctuations: fluctuated, varied, went up and down.
- Speed of change: rapidly, sharply, dramatically, steadily, gradually, slowly.
Describing Comparisons (Bar/Pie Charts, Tables)
- compared to, in contrast with, while, whereas, significantly larger/smaller than, the majority, a minority, accounted for.
Starting Sentences
- It is clear from the graph that...
- Overall, it can be seen that...
- The chart illustrates...
- Regarding X, the data shows...
graph TD
A["Understand the Prompt"] --> B["Identify Main Trends (Overview)"]
B --> C["Select Key Features & Data"]
C --> D{"What Type of Chart?"}
D --> |Line Graph| E["Describe Trends & Changes Over Time"]
D --> |Bar Chart/Table| F["Compare Categories & Values"]
D --> |Pie Chart| G["Describe Proportions & Shares"]
D --> |Process Diagram/Map| H["Describe Stages/Changes Spatially"]
E --> I["Draft Body Paragraphs (Details with Data)"]
F --> I
G --> I
H --> I
I --> J["Write Introduction & Overview"]
J --> K["Review: Cohesion, Coherence, Grammar, Vocab"]
K --> L["Check Word Count (150+)"]
3. Worked Example
Let's say you get a line graph showing the number of students studying French, German, and Spanish in a UK university from 2000 to 2010.
Prompt: The graph below shows the number of students studying three different languages at a UK university between 2000 and 2010. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Sample Band 7-level thinking:
- Introduction: Paraphrase: The line graph illustrates student numbers for French, German, and Spanish at a UK university over a ten-year period from 2000 to 2010.
- Overview: Main trends: Overall, it is clear that Spanish experienced a significant increase in student numbers, whereas French and German both saw declines, with French remaining the most popular language throughout the period despite a decrease. (No numbers here!)
- Body Paragraph 1 (French & German): Focus on the decline.
- In 2000, French was studied by approximately 200 students, making it the most popular language.
- However, this figure steadily declined to about 150 students by 2010.
- Similarly, German students, starting at around 150 in 2000, saw a consistent drop, finishing at roughly 100 students in 2010.
- Body Paragraph 2 (Spanish & Comparison): Focus on the rise and comparison.
- In stark contrast, the number of students opting for Spanish began at the lowest point, with just under 100 students in 2000.
- This figure rose significantly and steadily over the decade, surpassing German around 2005 and reaching approximately 180 students by 2010.
- Although Spanish experienced the most dramatic growth, French maintained its position as the language with the highest number of students throughout the period, despite its own decline.
4. Key Takeaways
- Always start with an introduction that paraphrases the prompt.
- The overview paragraph is critical; it must summarise main trends without data.
- Group information logically and use data only in your body paragraphs.
- Use a variety of vocabulary to describe trends, comparisons, and proportions.
- Ensure your sentences are grammatically accurate and show a range of structures.
- Don't just list numbers; explain what the numbers show or mean.
- Aim for around 170-190 words to comfortably meet the minimum.
Common Mistakes to Avoid:
* Adding your opinion or external knowledge (e.g., "French declined because it's harder").
* Describing every single data point on the graph. You need to select key features.
* Not providing an overview, or including detailed data in the overview.
* Repetitive vocabulary for describing changes (e.g., always "increased, increased").
* Using informal language or contractions in your academic writing.
5. Now Try It
Find a simple line graph online or in an IELTS practice book (e.g., showing population changes, sales figures, or temperatures over time). Spend 15 minutes writing a Task 1 response. Focus on writing a clear introduction, a strong overview without numbers, and two body paragraphs detailing the main trends with specific data. After writing, check if you used varied vocabulary and sentence structures, and if you avoided giving your opinion. Success looks like clearly describing the most important information from the graph in your own words, following the structure, and staying objective.
Frequently asked about Academic Writing Task 1: Describing Data
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