Determining Central Ideas

​Determining Central Ideas

By Donna Kapa

Determining Central Ideas

​Objectives

• Find and explain main ideas in an informational text.

• Identify the text’s structure and explain how the author organizes ideas.

• Analyze relationships between events and ideas to see how they connect.

• Use context clues to figure out the meaning of new words.

Open Ended

When do you think the first schools began? Who were the students?What might have been taught there?

​Finding the Main Idea

Main Idea = What the text is mostly about.

It’s the big picture, not the small details.

Ask yourself:

• Who or what is the text about?

• What is the most important thing the author is saying about that topic?

​Finding the Main Idea

Quick Tip:
Look for repeated words, first or last sentences of paragraphs, and headings — they often give clues to the main idea.

Draw

I have highlight the main idea of the paragraph.

Underline two details in blue that support the main idea.

Multiple Choice

Read "A Brief History of School."

Which of the following is NOT a main idea of this passage?

• Thousands of years ago, learning mostly happened at home.

• During the Middle Ages, monasteries became centers of learning.

• Only a few wealthy boys went to special schools

• In the 1800s, public schools were open to all children to learn reading, writing, and math.

Categorize

Options (4)

Learning happens mostly at home

Monastaries became centers for learning

Public schools established 1800's

Greek and Roman boys prepared to be citizens.

Place these events into the order in which they happened.

1st

2nd

3rd

4th

Multiple Choice

What is the overall structure of this text?

• Problem & Solution

• Chronological/Sequence

• Compare & Contrast

• Cause & Effect

​Using Context Clues to Determine Meaning

Context clues are hints in the sentence or paragraph that help you figure out what a word means.

Look for:

• 🔄 Restatements: The word is explained in another way.

• 🗣 Examples: The text lists examples of the word.

• ⚠ Contrasts: The text shows what the word is not.

• 💡 Overall Meaning: Think about what would make sense in the sentence.

​Using Context Clues to Determine Meaning

🔄 Restatements: The word is explained in another way.

Examples:

• The apprentice, or beginner, learned by watching the master work.

• He was a scribe, a person who copied books by hand, at the monastery.

Draw

Underline the restatement in this sentence.

​Using Context Clues to Determine Meaning

🗣 Examples: The text lists examples of the word.

Examples:

• Students studied agriculture, planting crops, caring for animals, and harvesting food.

• He brought several supplies for class, such as pencils, paper, and a ruler.

Draw

Underline the examples in this sentence.

​Using Context Clues to Determine Meaning

💡 Overall Meaning = Use the whole sentence or paragraph to figure out the word.

Examples:

• After running in the hot sun, he was parched and needed a big glass of water.

• The toddler was timid; she hid behind her mom when strangers came near.

Draw

Underline the clue that helps you figure out what the bold word means:

​Using Context Clues to Determine Meaning

🟡 Contrast Clues = The author shows what the word is not by using clue words.

Examples:

• Unlike private schools, public schools did not charge a fee for education.

• The cafeteria was loud, but the library was quiet and calm.

Draw

Underline the contrast in this sentence.

​Central Idea and Supporting Details

Central Idea = The Big Picture
The central idea is what the text is mostly about. It is the most important message the author wants you to understand.

Supporting Details:
Supporting details are the facts, examples, and explanations that prove or explain the central idea.

​Central Idea and Supporting Details

Text: By the 1800s, many countries created public school systems so all children could learn basic reading, writing, and math. Over time, schools added science, history, and the arts.

Central Idea: Schools changed to teach everyone and add more subjects.

Supporting Details:

• Public schools were created in the 1800s

• Schools added science, history, and the arts

Multiple Choice

What is the best central idea of "A Brief History of School"?

• Schools have changed over time to meet the needs of society

• Students learned on clay tablets in Mesopotamia

• Monks copied books by hand during the Middle Ages

• Schools teach science, history, and the arts today

Multiple Select

Which two details best support the central idea that schools have changed over time to meet the needs of society?

• Public schools were created in the 1800s

• Monks copied books by hand in monasteries

• Schools added science, history, and the arts

• Students wrote on clay tablets in Mesopotamia

​Today we learned how to:

• Find main ideas and supporting details in an informational text

• Determine the central idea — what the text is mostly about

• Identify the structure of a text, such as chronological order

• Use context clues (restatement, examples, contrast, overall meaning) to figure out word meanings

• See how events and ideas connect to show how schools have changed over time

Multiple Choice

What is a main idea?

• A small fact that is interesting but not important

• One of the big points the author makes in a section or paragraph

• The title of the passage

Multiple Choice

What are context clues?

• Pictures that explain the story

• Clues that help you figure out what a word means in a text

• The most important idea in the passage

• The words that rhyme

Multiple Choice

What is the central idea?

• The main message that ties all the main ideas together

• The most surprising fact in the text

• The first sentence in the text

• A small detail in one paragraph

Multiple Choice

Which type of context clue is used in this sentence?
"The classroom was quiet, but the hallway was noisy."

• Restatement

• Example

• Contrast

• Overall meaning

Multiple Choice

Which sentence uses a restatement context clue?

• The apprentice, or beginner, learned by watching the master work.

• Agriculture includes planting crops and caring for animals.

• The toddler was timid; she hid when strangers came near.

• The classroom was quiet, but the hallway was noisy.