Soccer players learn many skills when playing soccer.  Soccer players learn how to dribble and pass the ball.  They also learn how to control the ball so they can eventually score.  Most importantly, soccer players learn how to work together with their teammates.
What is the main idea?

One dinosaur had a brain that weighed about as much as three pencils.  Its body weighed ten tons and was over twenty feet in length.  As you can guess, this dinosaur did not think too clearly.  It wasn't the world's brightest dinosaur!  What is the main idea of this paragraph?

When we think of seaweed, we usually picture brown or green plants a foot or so in length.  Seaweeds are also of other colors.  Some are red.  Some kinds grow to lengths of a hundred feet!  These form giant seaweed forests, where many kinds of fish take shelter.  What is the main idea?

The range of a bird refers to the area over which it flies.  some birds are able to fly great distances, and range over almost the whole world.  Other birds have a very small range.  they travel over areas smaller than one hundred miles.  What is the main idea?

Not all animals that live in the water are fish.  Frogs and tadpoles, for example, spend part of their lives in water.  They are amphibians, not true fish.  Whales and seals are warm-blooded mammals.  Some snakes live partly in water too.  What is the main idea?

The red, green and amber traffic light is a safety signal.  Yet some drivers don't see it.  Some drivers don't obey it.  People cross the street without looking at it.  Often the traffic light turns out to be a signal of death.  What is the main idea?

John and Matt want to be firemen.  They want to ride on the big fire truck.  John wants to climb ladders and rescue people from fires.  Matt wants to hold the big hose and spray water on the fires to put them out.
What is the main idea?

Jenny visited her grandmother in the hospital.  She saw how kind and helpful the nurses were to her grandmother.  Now she wants to be a nurse when she grows up.  She wants to help sick people get well. 
What is the main idea?

Mrs. Jones and Mrs. Brown are bakers.  They work at a store called Bake Goods to Go.  Mrs. Jones works nights.  She bakes cakes, cookies, and pies.  Mrs. Brown works in the daytime.  She bakes bread and rolls.  Both Mrs. Jones and Mrs. Brown are very good bakers.
What is the main idea?

Mary has a new pet.  Her pet is a baby kitten.  It is soft and cuddly.  The kitten likes to sleep a lot.  Mary put a soft blanket in a box for its bed.  Mary plays with her kitten when it is awake.  She never forgets to feed her kitten.
What is the main idea?

The frog sat on the side of the pond.  He was very still.  His green color made him hard to see.  A bug flew near him.  His tongue zipped out, and he gobbled it up.  Then the frog was still again.  He waited for the next bug.
What is the main idea?

The Outsiders Excerpt
By S. E. Hinton
When I stepped out into the bright sunlight from the darkness of the movie house, I had only two things on my mind: Paul Newman and a ride home. I was wishing I looked like Paul Newman---he looks tough and I don't--- but I guess my own looks aren't so bad. I have light-brown, almost-red hair and greenish-gray eyes. I wish they were more gray, because I hate most guys that have green eyes, but I have to be content with what I have.My hair is longer than a lot of boys wear theirs,squared off in back and long at the front and sides, but I am a greaser and most of my neighborhood rarely bothers to get a haircut.Besides, I look better with long hair.
What is the main idea?