Keep your teeth happy. Brush your teeth twice a day. Make sure you floss your teeth every time you brush and after you eat. Avoid eating anything that sticks to your teeth, like candy and syrup. Eat vegetables and fruits that don't cause cavities. 
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Porpoises live in the earth's oceans and sometimes in bays and rivers near oceans. Porpoises are mammals. Their babies get their food from their mother's body. These animals live in the water, but they must come up for air. Porpoises are very interesting animals.
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Hummingbirds love pink or red flowers. They guard their favorite flowers and try to keep other birds away. They fight one another for food. Their wings make a whirring sound when they hover over flowers to sip nectar. The tiny birds fly long distances to go to a warmer climate for the winter. They make their tiny nests in shrubs or trees. 
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Eva wanted to surprise her sister Cindy for her birthday. She decided to plan a picnic for her sister. She made two sandwiches and put them in a bag. Then she put some cookies and bottles of water in the bag. When she told Cindy about the surprise, Cindy her sister a big hug. Then the girls walked to the park. 
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Juan loves to play games. His favorite game is chess because it requires a great deal of thought. Juan also likes to play less demanding board games that are based mostly on luck. He prefers Monopoly because it requires luck and skill. If he's alone, Juan likes to play action video games as long as they aren't too violent. 
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Maria is watching too much television. A toddler shouldn't be spending hours staring blankly at a screen. Worse yet, some of her wild behavior has been inspired by those awful cartoons she watches. We need to spend more time reading books with her and pull the plug on the TV. 
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Samantha, I can't eat or sleep when you are gone. I need to hear your scratchy voice and see your lovely toothless smile. I miss that special way you eat soup with your fingers. Please come home soon. 
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Someday we will all have robots that will be our personal assistants. They will look and behave much like humans. We will be able to talk to these mechanical helpers. Amazingly, the robots of the future will be able to learn from experience. They will be smart, strong, and untiring workers whose only goal will be to make our lives easier. 
What is the main idea? 

Sally went shopping after school on Friday and all day Saturday. She bought a lot of new outfits. On Sunday, her mother took her to the outlet mall so she could finish buying clothes for the new school year. She also bought school supplies, so she would be prepared for her classes. 
What is the main idea?

Niagra Falls is one of the most beautiful sights in North America. It is on the Niagra River halfway between Lake Ontario and Lake Erie. Niagra Falls is located on the American and Canadian border. The American Falls is 167 feet high. On the Canadian side, the Horseshoe Falls is 161 feet high. 
Which of the following is NOT a supporting detail? 

The Statue of Liberty is visited by thousands of people every year. The Statue of Liberty is a 151 foot tall statue of a woman holding a book and a torch. It was a gift of friendship from the people of France. It has become the universal symbol for freedom.
Which of the following is NOT a supporting detail? 

The peregrine falcon is a beautiful wild bird. It is also one of the fastest. In 1978, the peregrine falcon was placed on the endangered species list. The main reason the peregrine falcon was dying out was the use of pesticides. 
Which of the following is NOT a supporting detail? 

Danger often appears in the most unexpected places. People usually think of the bathtub as a safe, quiet place. But more accidents occur there than anywhere else in the home. Slips or falls that occur while entering and leaving the tub injure thousands of people every year. Most people think of a baker as having a safe and pleasant job; however, rolling, kneading, and pounding dough causes clouds of flour dust, which can enter the lungs and disable the baker. 
Which of the following is NOT a supporting detail? 

Emily went hiking last week. She climbed large rocks and ate on the edge of a cliff. She used all of her climbing gear to get to the top of a mountain. She saw many awesome sights of the landscape below and felt like she could touch the sky above.