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Identifying Topics,
Main Ideas, and
Supporting Details
Understanding the TOPIC,
the gist, or the big ideas
of a textbook chapter,
an article, a paragraph,
a sentence or a passage
is a sophisticated reading task.
Being able to draw conclusions,
evaluate, and interpret
articles or chapters
is important for overall
comprehension in non-fiction
reading.
Textbook chapters, articles,
paragraphs, sentences, or
passages all have topics and
main ideas.
The TOPIC is the broad, general
theme or message.
It is what some call the subject.
The MAIN IDEA is the
“important point" being
expressed.
DETAILS
support the main idea by telling
how, what, when, where, why,
how much, or how many.
Locating the topic, main idea,
and supporting details help you
understand the point(s) the
writer is attempting to express.
Understanding the
relationship between main
ideas and details will
increase your reading
comprehension.
Grasping the
Main Idea
A paragraph is a group of sentences related
to a particular topic.
Every paragraph has a purpose, important
point or main idea.
The main idea is the most important piece
of information the author wants you to
know about that paragraph.
A writer will state his/her main idea clearly
somewhere in the paragraph.
That main idea may be stated at the beginning
of the paragraph, in the middle, or at the end.
The sentence in which the main idea is stated is
called the topic sentence of that paragraph.
The topic sentence announces the general
subject, ideas or arguments to be dealt with in
the paragraph.
Although the topic sentence may appear
anywhere in the paragraph, it is usually first -
and for a very good reason:
This sentence provides focus for the writer while
writing and for the reader while reading.
Strategy:
When you find the topic sentence, be sure
to underline it so that it will stand out not
only now, but also later when you review.
Identifying
the Topic
The first thing you must be able to do to
get at the main idea of a paragraph is to
identify the topic - the subject of the
paragraph.
Sometimes you can spot the topic by
looking for a word or two that repeat.
Usually you can state the topic
in a few words.
Think of the paragraph as a wheel with the topic
being the hub - the central core around which the
whole wheel (or paragraph) spins.
Your strategy for topic identification is simply to ask
yourself the question, "What is this about?"
Keep asking yourself that question as you read a
paragraph, until the answer to your question
becomes clear.
wore their T-shirts backward
dessert was served first
Sometimes you can spot the topic by
looking for a word or two that repeat.
Usually you can state the topic
in a few words.
Let us try this topic-finding strategy:
Read the paragraph – Ask yourself the question, "What
is this paragraph about?"
To answer, say to yourself in your mind, "The author
keeps talking about ______________ The topic must be
______________."
Swim teams can be good for kids. They make friends.
The kids get wet and have fun. They exercise their
bodies. They learn to swim faster. The teams go to
swim meets. They race other teams at the meets. Some
of them will win, and that feels great!
Read the second paragraph - Ask yourself "What is this
paragraph about?"
Did you say to yourself, "This paragraph is about
______________ ? That is the topic.”
Tim Cordes went blind as a teen. He did not let his
blindness stop him. He learned how to water ski and
how to canoe. He learned how to compose music. He
became a black belt in martial arts. He carried the
Olympic torch in 2002. He went to school and became
a doctor!
The bulk of an expository paragraph is made
up of supporting sentences (details), which
help to explain or prove the main idea.
These sentences present facts, reasons,
examples, definitions, comparison,
contrasts, and other pertinent details.
They are most important because they
expand on the main idea.
The last sentence of a paragraph is likely to
be a concluding sentence.
It is used to sum up a discussion, to
emphasize a point, or to restate all or part
of the topic sentence so as to bring the
paragraph to a close.
The last sentence may also be a transitional
sentence leading to the next paragraph.
Of course, the paragraphs you'll be reading will be
part of some longer piece of writing - a textbook
chapter, a section of a chapter, or a newspaper or
magazine article.
Besides expository paragraphs, in which new
information is presented and discussed, these
longer writings contain three types of paragraphs:
introductory, transitional, and summarizing
Introductory paragraphs tell you, in advance, such things
as (1) the main ideas of the chapter or section; (2) how the
topic is developed; and (3) the writer's attitude toward the
topic.
Detail paragraphs are usually short; their sole function is
to expand on the thesis of the paper and provides answers
to the readers questions using details, descriptions, facts,
and opinions.
Summarizing paragraphs are used to restate briefly the
main ideas of the chapter or section. The writer may also
draw some conclusion from these ideas, or speculate on
some conclusion based on the evidence he/she has
presented.
EXERCISE:
Read the following paragraph
and underline the stated
main idea.
Write down in your own words
what you are able to conclude
from the information.
The rules of conduct during an examination are
clear. No books, calculators or papers are
allowed in the test room. Proctors will not allow
anyone with such items to take the test. Anyone
caught cheating will be asked to leave the room.
His or her test sheet will be taken. The incident
will be reported to the proper authority. At the
end of the test period, all materials will be
returned to the proctor. Failure to abide by these
rules will result in a failing grade for this test.
Answer:
You should have underlined the first sentence in
the paragraph - this is the stated main idea.
What can be concluded from the information is:
If you do not follow the rules, you will
automatically fail the test.
This concluding information is found in
the last sentence.
You can't comprehend the
subject matter if you haven't
identified the topic, the main
idea, and the supporting
details.
Read each paragraph carefully.
Choose the best answer to the
questions that follow.
Juan loves to play games. His favorite game is
chess because it requires a great deal of thought.
Juan also likes to play less demanding board
games that are based mostly on luck. He prefers
Monopoly because it requires luck and skill. If
he’s alone, Juan likes to play action video games
as long as they aren’t too violent.
What is the main idea of this
paragraph?
a. Juan dislikes violence.
b. Juan likes to think.
c. Juan enjoys Monopoly.
d. Juan enjoys playing games.
Maria is watching too much
television. A toddler shouldn’t be
spending hours staring blankly at a
screen. Worse yet, some of her wild
behavior has been inspired by those
awful cartoons she watches. We need
to spend more time reading books
with her and pull the plug on the TV!
What is the main idea of this
paragraph?
a) Watching a lot of television isn’t good for
Maria.
b) Books are good.
c) All cartoons are bad.
d) Some cartoons are bad for Maria.
Samantha, I can’t eat or sleep when you
are gone. I need to hear your scratchy
voice and see your lovely toothless smile. I
miss that special way that you eat soup
with your fingers. Please come home
soon!
What is the main idea of this
paragraph?
a) Samantha, you have bad manners.
b) Samantha, you should see a dentist.
c) Samantha, I miss you.
d) Samantha, I have lost my appetite.
Expository Paragraph A
1
Do you have a favorite season? 2
Winter, fall, and spring have
many advantages. 3
However, summertime is my favorite
season because it offers the tranquility of the beach as well as
the exhilaration of outdoor sports. 4
First, sitting on the other
side of a sand dune, hidden by sea oats and sedge, I like
looking at the Atlantic Ocean, scanning for dolphins and
pelicans. 5
Looking at something larger than I am gives me a
sense of awe and gratitude and provides a backdrop for some
deep musings. 6
Second, summertime provides me with the
chance to go sailing, surfing, and hiking along the shore. 7
The
exercise enhances my sense of well being and creates a feeling
of optimism.
The topic of the paragraph is  
a) summertime
b) seasons at the beach
c) ways to develop optimism
Expository Paragraph B
A rite of passage, according to psychologists, is an event that prompts
movement from one stage of life to another. 2
Weddings and graduations
are two examples of new beginnings that are considered significant rites
of passage. 3
For the bride and groom, a wedding signifies the covenant
of fidelity and the couple's public declaration of love. 4
Making the
promise for life before loved ones is the first step to their new life
together. 5
Graduations also signify a rite of passage. 6
Tests will not be
scheduled, and paperwork will no longer be graded on a curve.
7
Whether it is a high school or college graduation, students
acknowledge they are beginning a new path on their journey.
The topic of the paragraph is 
 
•a psychologist's view of life.  
•stages of life.  
•new beginnings in life.  
•the importance of weddings.
Expository Paragraph C
Coveted sports cars are impressive status symbols signifying
affluence, competence, and privilege. 2
People rationalize that
they are purchasing a Corvette, BMW Z3, or even a Dodge
Viper for their safety record, their quality construction, or the
value they are receiving in a high-performance car. 3
However,
they are also saying, "Look at me! I can afford this expensive
vehicle, so I am obviously successful." 4
A truly successful person,
however, does not necessarily need to spend a small fortune on
transportation. 5
For example, Barbara Walters does not even
own a driver's license. 6
However, a very wealthy driver can
rightfully rationalize, "I am financially secure, and I deserve an
expensive toy because I worked hard for it." 7
Consequently,
the car is more than just a fun diversion.
The main idea of the paragraph is
a) sentence 1. b) sentence 2. c) sentence 3. d) sentence 7.
Congratulations!!
You are now an expert
at identifying
topic, main idea, and
supporting details!!

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Main Idea Slide Show

  • 1. Identifying Topics, Main Ideas, and Supporting Details
  • 2. Understanding the TOPIC, the gist, or the big ideas of a textbook chapter, an article, a paragraph, a sentence or a passage is a sophisticated reading task.
  • 3. Being able to draw conclusions, evaluate, and interpret articles or chapters is important for overall comprehension in non-fiction reading.
  • 4. Textbook chapters, articles, paragraphs, sentences, or passages all have topics and main ideas. The TOPIC is the broad, general theme or message. It is what some call the subject.
  • 5. The MAIN IDEA is the “important point" being expressed.
  • 6. DETAILS support the main idea by telling how, what, when, where, why, how much, or how many.
  • 7. Locating the topic, main idea, and supporting details help you understand the point(s) the writer is attempting to express.
  • 8. Understanding the relationship between main ideas and details will increase your reading comprehension.
  • 10. A paragraph is a group of sentences related to a particular topic. Every paragraph has a purpose, important point or main idea. The main idea is the most important piece of information the author wants you to know about that paragraph.
  • 11. A writer will state his/her main idea clearly somewhere in the paragraph. That main idea may be stated at the beginning of the paragraph, in the middle, or at the end. The sentence in which the main idea is stated is called the topic sentence of that paragraph.
  • 12. The topic sentence announces the general subject, ideas or arguments to be dealt with in the paragraph. Although the topic sentence may appear anywhere in the paragraph, it is usually first - and for a very good reason: This sentence provides focus for the writer while writing and for the reader while reading.
  • 13. Strategy: When you find the topic sentence, be sure to underline it so that it will stand out not only now, but also later when you review.
  • 15. The first thing you must be able to do to get at the main idea of a paragraph is to identify the topic - the subject of the paragraph. Sometimes you can spot the topic by looking for a word or two that repeat. Usually you can state the topic in a few words.
  • 16. Think of the paragraph as a wheel with the topic being the hub - the central core around which the whole wheel (or paragraph) spins. Your strategy for topic identification is simply to ask yourself the question, "What is this about?" Keep asking yourself that question as you read a paragraph, until the answer to your question becomes clear.
  • 17. wore their T-shirts backward dessert was served first
  • 18. Sometimes you can spot the topic by looking for a word or two that repeat. Usually you can state the topic in a few words.
  • 19. Let us try this topic-finding strategy: Read the paragraph – Ask yourself the question, "What is this paragraph about?" To answer, say to yourself in your mind, "The author keeps talking about ______________ The topic must be ______________." Swim teams can be good for kids. They make friends. The kids get wet and have fun. They exercise their bodies. They learn to swim faster. The teams go to swim meets. They race other teams at the meets. Some of them will win, and that feels great!
  • 20. Read the second paragraph - Ask yourself "What is this paragraph about?" Did you say to yourself, "This paragraph is about ______________ ? That is the topic.” Tim Cordes went blind as a teen. He did not let his blindness stop him. He learned how to water ski and how to canoe. He learned how to compose music. He became a black belt in martial arts. He carried the Olympic torch in 2002. He went to school and became a doctor!
  • 21. The bulk of an expository paragraph is made up of supporting sentences (details), which help to explain or prove the main idea. These sentences present facts, reasons, examples, definitions, comparison, contrasts, and other pertinent details. They are most important because they expand on the main idea.
  • 22. The last sentence of a paragraph is likely to be a concluding sentence. It is used to sum up a discussion, to emphasize a point, or to restate all or part of the topic sentence so as to bring the paragraph to a close. The last sentence may also be a transitional sentence leading to the next paragraph.
  • 23. Of course, the paragraphs you'll be reading will be part of some longer piece of writing - a textbook chapter, a section of a chapter, or a newspaper or magazine article. Besides expository paragraphs, in which new information is presented and discussed, these longer writings contain three types of paragraphs: introductory, transitional, and summarizing
  • 24. Introductory paragraphs tell you, in advance, such things as (1) the main ideas of the chapter or section; (2) how the topic is developed; and (3) the writer's attitude toward the topic. Detail paragraphs are usually short; their sole function is to expand on the thesis of the paper and provides answers to the readers questions using details, descriptions, facts, and opinions. Summarizing paragraphs are used to restate briefly the main ideas of the chapter or section. The writer may also draw some conclusion from these ideas, or speculate on some conclusion based on the evidence he/she has presented.
  • 25. EXERCISE: Read the following paragraph and underline the stated main idea. Write down in your own words what you are able to conclude from the information.
  • 26. The rules of conduct during an examination are clear. No books, calculators or papers are allowed in the test room. Proctors will not allow anyone with such items to take the test. Anyone caught cheating will be asked to leave the room. His or her test sheet will be taken. The incident will be reported to the proper authority. At the end of the test period, all materials will be returned to the proctor. Failure to abide by these rules will result in a failing grade for this test.
  • 27. Answer: You should have underlined the first sentence in the paragraph - this is the stated main idea. What can be concluded from the information is: If you do not follow the rules, you will automatically fail the test. This concluding information is found in the last sentence.
  • 28. You can't comprehend the subject matter if you haven't identified the topic, the main idea, and the supporting details.
  • 29. Read each paragraph carefully. Choose the best answer to the questions that follow.
  • 30. Juan loves to play games. His favorite game is chess because it requires a great deal of thought. Juan also likes to play less demanding board games that are based mostly on luck. He prefers Monopoly because it requires luck and skill. If he’s alone, Juan likes to play action video games as long as they aren’t too violent.
  • 31. What is the main idea of this paragraph? a. Juan dislikes violence. b. Juan likes to think. c. Juan enjoys Monopoly. d. Juan enjoys playing games.
  • 32. Maria is watching too much television. A toddler shouldn’t be spending hours staring blankly at a screen. Worse yet, some of her wild behavior has been inspired by those awful cartoons she watches. We need to spend more time reading books with her and pull the plug on the TV!
  • 33. What is the main idea of this paragraph? a) Watching a lot of television isn’t good for Maria. b) Books are good. c) All cartoons are bad. d) Some cartoons are bad for Maria.
  • 34. Samantha, I can’t eat or sleep when you are gone. I need to hear your scratchy voice and see your lovely toothless smile. I miss that special way that you eat soup with your fingers. Please come home soon!
  • 35. What is the main idea of this paragraph? a) Samantha, you have bad manners. b) Samantha, you should see a dentist. c) Samantha, I miss you. d) Samantha, I have lost my appetite.
  • 36. Expository Paragraph A 1 Do you have a favorite season? 2 Winter, fall, and spring have many advantages. 3 However, summertime is my favorite season because it offers the tranquility of the beach as well as the exhilaration of outdoor sports. 4 First, sitting on the other side of a sand dune, hidden by sea oats and sedge, I like looking at the Atlantic Ocean, scanning for dolphins and pelicans. 5 Looking at something larger than I am gives me a sense of awe and gratitude and provides a backdrop for some deep musings. 6 Second, summertime provides me with the chance to go sailing, surfing, and hiking along the shore. 7 The exercise enhances my sense of well being and creates a feeling of optimism. The topic of the paragraph is   a) summertime b) seasons at the beach c) ways to develop optimism
  • 37. Expository Paragraph B A rite of passage, according to psychologists, is an event that prompts movement from one stage of life to another. 2 Weddings and graduations are two examples of new beginnings that are considered significant rites of passage. 3 For the bride and groom, a wedding signifies the covenant of fidelity and the couple's public declaration of love. 4 Making the promise for life before loved ones is the first step to their new life together. 5 Graduations also signify a rite of passage. 6 Tests will not be scheduled, and paperwork will no longer be graded on a curve. 7 Whether it is a high school or college graduation, students acknowledge they are beginning a new path on their journey. The topic of the paragraph is    •a psychologist's view of life.   •stages of life.   •new beginnings in life.   •the importance of weddings.
  • 38. Expository Paragraph C Coveted sports cars are impressive status symbols signifying affluence, competence, and privilege. 2 People rationalize that they are purchasing a Corvette, BMW Z3, or even a Dodge Viper for their safety record, their quality construction, or the value they are receiving in a high-performance car. 3 However, they are also saying, "Look at me! I can afford this expensive vehicle, so I am obviously successful." 4 A truly successful person, however, does not necessarily need to spend a small fortune on transportation. 5 For example, Barbara Walters does not even own a driver's license. 6 However, a very wealthy driver can rightfully rationalize, "I am financially secure, and I deserve an expensive toy because I worked hard for it." 7 Consequently, the car is more than just a fun diversion. The main idea of the paragraph is a) sentence 1. b) sentence 2. c) sentence 3. d) sentence 7.
  • 39. Congratulations!! You are now an expert at identifying topic, main idea, and supporting details!!