This simple strategy teaches students to generate a graphic organizer containing
the main ideas of an expository passage.
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Jim's Hints for Using...
Main-Idea Maps |
Use
a Giant 'Main Idea Map' to Teach The Strategy. You can make
the teaching of this strategy fun and highly interactive by drawing a giant version of the Main Idea Graphic Organizer
onto newsprint and laying it on the floor.
Assign each individual in the class to read through a practice passage and write out a summary main-idea phrase
and key ideas or facts for each paragraph. Review the passage with the group.
For each paragraph, invite a volunteer to stand on the space on the giant organizer that corresponds to the paragraph
and read aloud his or her summary for class feedback. Continue through the passage until all paragraphs have been
reviewed and student volunteers have occupied each point on the graphic organizer. |
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Reserve at least a full instructional session to introduce this comprehension strategy. (For effective-teaching
tips, consult the guidelines presented in Introducing
Academic Strategies to Students: A Direct-Instruction Approach).
Materials:
- Overhead transparencies of practice expository passages, transparency markers
- Student copies of practice expository passages (optional) or reading/text books,
Main Idea Graphic Organizer sheet or blank paper
Preparation:
- Prepare overheads of sample passages.
Steps in Implementing This Intervention:
Step 1: Introduce the strategy by
telling students that we can draw pictures, or Main Idea Maps, that help us to understand how the ideas of a multi-paragraph
passage fit together. Present these three steps for mapping out the main ideas of an expository:
Locating the Main Ideas of Paragraphs.
Read through a short (2-6 paragraph) practice expository passage with students.
On a blank overhead transparency or chart paper, begin building a graphic organizer by writing the title of the
passage in the center. Draw a box around the title. (If the passage has no title, query the class and make up a
suitable title based on their suggestions.) NOTE: Instead of drawing your own map, you can use the pre-formatted
Main Idea Graphic Organizer that is included with this strategy.
Tell students that some paragraphs have summary sentences that state the main idea or "gist" of the paragraph
or passage. Other paragraphs have implied main ideas, which the reader must figure out, based on key facts or ideas
that they contain.
Go through each paragraph in the practice passage and identify the paragraph's main idea. Demonstrate how to summarize
that main idea as a single, succinct phrase.
Building the Main Idea Graphic Organizer. As
you summarize each paragraph's main idea, write the number of the paragraph and main-idea summary phrase on the
graphic organizer. (Start writing at the upper left corner of the organizer sheet and continue clockwise around
the page. Space the summary phrases to allow space to write under each. See the sample "Main Idea Graphic
Organizer.").
Adding Key Facts. When you have
written the main idea for all of the paragraphs onto the graphic organizer, return to the passage. For each paragraph,
pull out 2-3 important facts, ideas, or supporting details. On the graphic organizer, write these key pieces of
additional information under the main-idea phrase for that paragraph. Then draw a box around the main-idea and
supporting details and move on to the next paragraph.
Step 2: Practice Using the Graphic
Organizer as a Study Tool. Demonstrate how the completed Main Idea Graphic Organizer can be a useful method to
summarize and review the content of expository passages. Give students new practice passages and have them create
their own graphic organizers. Provide feedback and encouragement as needed.
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References
Berkowitz, S.J. (1986). Effects of instruction in text organization on
sixth-grade students' memory for expository reading. Reading Research
Quarterly, 21, 161-178.
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