Main Idea
What’s the Big Idea?
Main Idea
The purpose of the paragraph or text
• All information in the paragraph should
connect to the main idea
• Some information is not as important
• Good readers identify key ideas
Identifying Main Idea
1. Read the whole text.
2. Ask, “What is the author doing here?”
3. Pay extra attention to the first and last
sentence.
Example
Neil Armstrong and Buzz Aldrin were
the first men to walk on the surface of the
moon, but they were not the last. That
was Gene Cernan, the last man to step off
the lunar surface. In total there have been
twelve men who have walked on the
moon, all of whom had done so between
1969 and 1972, which is the most recent
non-Michael Jackson moon walking.
Understanding Main Idea
You must comprehend the text.
Focus on the BIGGEST idea.
This paragraph is about moon walkers.
Armstrong & Aldrin
First Men on the Moon
Cernan was the
Last Man on the Moon
12 Men Have Walked
On the Moon
Careful…
Test writers may ask you:
“Another good title for this passage would be…”
Or
“Which makes the best proposition?”
It’s just a way of asking for the main idea.
Practice
Summarize each passage in one sentence,
including the main idea by saying what
each paragraph is about.
This paragraph is about rare and valuable
pennies.
A penny for your thoughts? If it’s a 1943
copper penny, it could be worth as much as
fifty thousand dollars. In 1943, most pennies
were made out of steel since copper was
needed for World War II, so the 1943 copper
penny is ultra-rare. Another rarity is the 1955
double die penny. These pennies were
mistakenly double stamped, so they have
overlapping dates and letters. If it’s
uncirculated, it’d easily fetch $25,000 at an
auction. Now that’s a pretty penny.
This paragraph is about how reality television
isn't always "real."
When one hears the term “reality” applied to a
television show, one might expect that the events
portrayed occurred naturally or, at the least, were not
scripted, but this is not always the case. Many reality
shows occur in unreal environments, like rented mansions
occupied by film crews. Such living environments do not
reflect what most people understand to be “reality.” Worse,
there have been accusations that events not captured on
film were later restaged by producers. Worse still, some
involved in the production of “reality” television claim that
the participants were urged to act out story lines
premeditated by producers. With such accusations floating
around, it’s no wonder many people take reality TV to be
about as real as the sitcom.
This paragraph is about physical
features of Yellowstone Park.
Yellowstone National Park is mainly located
in Wyoming, although three percent is located in
the state of Montana. The Continental Divide of
North America runs diagonally through the
southwestern part of the park. The park sits on the
Yellowstone Plateau, which is an average
elevation of 8,000 feet above sea level. This
plateau is bounded on nearly all sides by mountain
ranges. There are 290 waterfalls that are at least
fifteen feet in the park, the highest being the Lower
Falls of the Yellowstone River, which falls 308 feet.
What is the this picture mainly
about?
State a few details.
Supporting details
• Supporting details are facts and ideas that
explain the main idea of a paragraph.
• They include key details and minor details.
• Key details are those that directly explain
the main idea, while minor details are
those that add information.
Practice
Find the details that support the main idea.
This paragraph is about rare and valuable
pennies.
A penny for your thoughts? If it’s a 1943
copper penny, it could be worth as much as
fifty thousand dollars. In 1943, most pennies
were made out of steel since copper was
needed for World War II, so the 1943 copper
penny is ultra-rare. Another rarity is the 1955
double die penny. These pennies were
mistakenly double stamped, so they have
overlapping dates and letters. If it’s
uncirculated, it’d easily fetch $25,000 at an
auction. Now that’s a pretty penny.
This paragraph is about rare and
valuable pennies. Details?
A penny for your thoughts? If it’s a 1943
copper penny, it could be worth as much as
fifty thousand dollars. In 1943, most pennies
were made out of steel since copper was
needed for World War II, so the 1943 copper
penny is ultra-rare. Another rarity is the 1955
double die penny. These pennies were
mistakenly double stamped, so they have
overlapping dates and letters. If it’s
uncirculated, it’d easily fetch $25,000 at an
auction. Now that’s a pretty penny.
This paragraph is about how reality television
isn't always "real."
When one hears the term “reality” applied to a
television show, one might expect that the events
portrayed occurred naturally or, at the least, were not
scripted, but this is not always the case. Many reality
shows occur in unreal environments, like rented mansions
occupied by film crews. Such living environments do not
reflect what most people understand to be “reality.” Worse,
there have been accusations that events not captured on
film were later restaged by producers. Worse still, some
involved in the production of “reality” television claim that
the participants were urged to act out story lines
premeditated by producers. With such accusations floating
around, it’s no wonder many people take reality TV to be
about as real as the sitcom.
This paragraph is about how reality television
isn't always "real.“ Details?
When one hears the term “reality” applied to a
television show, one might expect that the events
portrayed occurred naturally or, at the least, were not
scripted, but this is not always the case. Many reality
shows occur in unreal environments, like rented mansions
occupied by film crews. Such living environments do not
reflect what most people understand to be “reality.” Worse,
there have been accusations that events not captured on
film were later restaged by producers. Worse still, some
involved in the production of “reality” television claim that
the participants were urged to act out story lines
premeditated by producers. With such accusations floating
around, it’s no wonder many people take reality TV to be
about as real as the sitcom.
This paragraph is about physical
features of Yellowstone Park.
Yellowstone National Park is mainly located
in Wyoming, although three percent is located in
the state of Montana. The Continental Divide of
North America runs diagonally through the
southwestern part of the park. The park sits on the
Yellowstone Plateau, which is an average
elevation of 8,000 feet above sea level. This
plateau is bounded on nearly all sides by mountain
ranges. There are 290 waterfalls that are at least
fifteen feet in the park, the highest being the Lower
Falls of the Yellowstone River, which falls 308 feet.
This paragraph is about physical
features of Yellowstone Park. .Details?
Yellowstone National Park is mainly located
in Wyoming, although three percent is located in
the state of Montana. The Continental Divide of
North America runs diagonally through the
southwestern part of the park. The park sits on the
Yellowstone Plateau, which is an average
elevation of 8,000 feet above sea level. This
plateau is bounded on nearly all sides by mountain
ranges. There are 290 waterfalls that are at least
fifteen feet in the park, the highest being the Lower
Falls of the Yellowstone River, which falls 308 feet.