Reading: Summarising Main Ideas and Supporting Details for JSS 1

Reading: Summarising Main Ideas and Supporting Details for JSS 1

Performance Objectives

By the end of the lesson, students should be able to:

1. identify topic sentences from paragraphs/passages;
2. identify words and expressions that redirect attention to the main points;
3. summarize paragraphs/passages by identifying key ideas.

Meaning of Summary

A summary is a short, clear statement of the main points of a text, written in one’s own words.

When reading a long passage, a book, or a newspaper article, it is often necessary to explain the core message to someone else without repeating every single word. Summarising helps to extract the most important information and leave out unnecessary details, examples, and repetitions. This skill is useful for studying, writing reports, and understanding complex information quickly.

Topic Sentences and Supporting Details

To write a good summary, a reader must understand how a paragraph is structured. A well-written paragraph usually contains one main idea, which is supported by other sentences.

A topic sentence is the sentence in a paragraph that contains the main idea or central point of that paragraph.

The topic sentence acts as an umbrella for the rest of the paragraph. It is often, but not always, the first sentence in the paragraph. It tells the reader what the entire paragraph is about.

Supporting details are sentences that explain, describe, or give examples to support the topic sentence.

These details provide evidence, illustrations, or explanations that make the main idea clearer. When summarising, supporting details are usually left out so that only the main idea remains.

The diagram below illustrates the relationship between the topic sentence and supporting details in a paragraph.

Identifying Topic Sentences

Finding the topic sentence is the first step in summarising a paragraph. To identify a topic sentence, a reader should look for the sentence that states the general subject of the paragraph.

Consider the following paragraph about agriculture in Nigeria:

Agriculture is the backbone of the Nigerian economy. It provides food for millions of citizens across the country. It also creates employment opportunities for rural farmers and supplies raw materials to local industries. Furthermore, crops like cocoa and sesame seeds are exported to earn foreign exchange.

In the paragraph above, the first sentence, “Agriculture is the backbone of the Nigerian economy,” is the topic sentence. It states the main point. The other sentences are supporting details that explain how agriculture provides food, jobs, raw materials, and export earnings.

Words and Expressions that Redirect Attention

Writers use special words and expressions to guide readers through a text. Some of these words act as signposts. They redirect the reader’s attention to the most important points, show a change in direction, or signal a conclusion.

Recognising these words helps a reader locate the key ideas quickly during summary writing.

Common words and expressions that redirect attention include:

1. Words that show contrast or change direction: however, but, on the other hand, yet, nevertheless. These words tell the reader that a different, often more important, point is about to be made.
2. Words that emphasize a main point: indeed, in fact, most importantly, clearly, actually. These words signal that the writer is highlighting a key idea.
3. Words that show a conclusion or result: therefore, consequently, in conclusion, as a result, thus. These words introduce the final summary or outcome of an argument.

The diagram below shows how these transition words act as signposts to guide a reader toward the main points of a text.

Consider how a transition word redirects attention in the following sentences:

Many people believe that city life is the best because of modern social amenities. However, rural areas offer a peaceful environment and fresh food that cities lack.

In this example, the word “however” redirects the reader’s attention from the benefits of city life to the main point of the comparison, which is the advantage of rural life.

How to Summarize a Paragraph or Passage

Summarising requires active reading and clear writing. The process involves condensing a large amount of text into a few essential points.

The procedure for summarising a text involves the following steps:

1. Read the passage carefully: Read the entire text once or twice to understand the general message and the author’s purpose.
2. Identify the topic sentence of each paragraph: Locate the sentence that carries the main idea in each paragraph. Underline or highlight it.
3. Look for signpost words: Pay attention to words like “however,” “therefore,” and “most importantly” to find where the author emphasizes key points.
4. Discard unnecessary details: Cross out examples, statistics, repetitions, and long explanations. These are not needed in a summary.
5. Draft the summary in simple sentences: Write down the main ideas using clear, grammatically correct sentences. Use own words as much as possible.
6. Review and refine: Check the summary against the original text to ensure that the meaning has not been changed and that no unnecessary details were included.

Worked Examples of Summarisation

Below are examples of how to identify topic sentences, key ideas, and write summaries.

Worked Example 1: Single Paragraph

Read the paragraph below:

Regular exercise is highly beneficial to the human body. It strengthens the muscles and keeps the joints flexible. It also improves blood circulation, which helps the heart function properly. Furthermore, physical activity releases chemicals in the brain that reduce stress and make people feel happier.

To summarize this paragraph, the key elements must be identified:

1. Topic Sentence: Regular exercise is highly beneficial to the human body.
2. Supporting Details to discard: Details about muscles, joints, blood circulation, heart function, and brain chemicals.
3. Summary: Regular exercise improves physical and mental health.

Worked Example 2: Two-Paragraph Passage

Read the passage below:

Plastic pollution has become a major environmental crisis in Nigerian cities. Every day, thousands of single-use plastic bags and bottles are discarded carelessly on the streets. These wastes block drainage systems, leading to severe flooding during the rainy season. In fact, plastic litter has turned many beautiful urban areas into unsightly dumpsites.

Governments and communities must take immediate action to address this problem. Recycling programmes should be established in every local government area to process plastic waste. Furthermore, citizens must be educated on the importance of proper waste disposal. Therefore, a clean environment can only be achieved through collective effort.

To summarize this passage, each paragraph must be analyzed:

1. Paragraph 1 Analysis: The topic sentence is the first sentence: “Plastic pollution has become a major environmental crisis in Nigerian cities.” The expression “In fact” redirects attention to the severity of the litter. The key idea is that plastic waste is causing serious environmental problems in Nigerian cities.
2. Paragraph 2 Analysis: The topic sentence is: “Governments and communities must take immediate action to address this problem.” The word “Therefore” introduces the concluding main point. The key idea is that solving plastic pollution requires joint action from the government and citizens.
3. Combined Summary: Plastic pollution is a major environmental crisis in Nigerian cities, and solving it requires the joint effort of the government and the citizens.

Practice Exercises

Read the passages below and answer the questions that follow to practice summary skills.

Passage A: Mosquitoes and Malaria

Mosquitoes are small insects, but they are among the deadliest creatures on earth. They carry dangerous parasites that cause malaria, a disease that affects millions of people in tropical regions. When an infected mosquito bites a person, it transfers the parasite directly into the bloodstream. Consequently, individuals suffer from high fever, chills, and severe headaches. To prevent this disease, people must use insecticide-treated nets and eliminate stagnant water around their homes where mosquitoes breed.

Answer the following questions based on Passage A:

1. Identify the topic sentence of the paragraph.
2. Identify the word in the paragraph that redirects attention to the consequences of a mosquito bite.
3. In one sentence, summarize the main message of the paragraph.

Passage B: Traditional Festivals in Nigeria

Traditional festivals play a vital role in preserving the cultural heritage of Nigeria. These celebrations, such as the Argungu Fishing Festival and the New Yam Festival, bring people together to honour their ancestors and thank God for a good harvest. During these events, young people learn about their history, customs, and traditional values through songs, dances, and storytelling.

However, modern lifestyles and technology are gradually reducing interest in these cultural events. Many young people now prefer television and social media to community festivals. Therefore, elders and schools must find creative ways to promote traditional festivals so that Nigerian culture does not die out.

Answer the following questions based on Passage B:

1. Identify the topic sentence of the first paragraph.
2. Identify the word in the second paragraph that redirects attention to a contrasting situation.
3. Identify the word in the second paragraph that introduces the final recommendation.
4. In two sentences, summarize the main ideas of the passage.