Learning Objective:CCSS.ELA-Literacy.RI.4.2Determine the main idea of a text and explain how it is supported by key details; summarize the text.

What will we determine today?

CCSS.ELA-Literacy.RI.4.2Determine the main idea of a text and explain how it is supported by key details; summarize the text.

What are we going to do?

What does determine mean?determine means __________.

CFU

1 determine means find

Vocabulary

Discuss with your partner an idea that explains what all these people are doing?

All these picture show____________

Main Idea or Topic Sentence

A Main Idea/ Topic Sentence states what the passage is mostly

about.Example: The first ferris wheel was designed by George W. FerrisSupporting Details are sentences that explain and help you

understand the main idea• Ferris, a bridge builder from Pennsylvania came up with the

idea if turning a merry go round on its side• He used his knowledge of steel construction to draw up the

plans.• The wheel could hold up to 2,160 passengers.

Concept Development

Skill Development/Guided Practice

Determine the main idea1

2

3

Read text carefullyAsk yourself, “What is text mainly about?” (topic)Ask yourself , “Do the details support the main idea?”

Step 1- Read the passage

Many newborn rattlesnakes do not survive their first year of life. A baby rattlesnake is only about ten inches long. Although baby rattlesnakes have short fangs and a poisonous bite, they are often eaten by birds and animals. The adult rattlesnakes do not raise their young. The young snakes are entirely on their own. Many die of hunger. In the winter, they die if they do not find a warm place where they can hibernate.

Step 2- Ask yourself, “What is text mainly about?” (topic)

Step 3- Ask yourself , “Do the details support the main idea?”

Many newborn rattlesnakes do not survive their first year of life.

they are often eaten by birds and animals.

The young snakes are entirely on their own. Many die of hunger.

In the winter, they die if they do not find a warm place where they can hibernate.

Skill Development/Guided Practice

It is important to identify Main Idea and support because:

• You can understand reading better• You can use factual support statements

to explain your idea

Skill Development/Guided Practice

Large number of visitors to National Parks will cause damage to them.

People trample plants and soil

People’s cars carry chemicals that damage plants

Animals move out due to noise from helicopters

Granville Woods was an inventor

He improved telephone and telegraph

Invented system of overhead electric conducting lines

Invented automatic brakes

Paragraph 11. Granville Woods was an inventor. 2. He improved both the telephone and telegraph systems. 3. He invented a system of overhead electric conducting lines that led to the development of the overhead railway. 4. He also invented automatic air brakes.

Skill Closure