In 1999, twelve percent of public elementary schools in the United States required students to wear uniforms. Just three years later, the amount was almost double that.

    A study of six big-city Ohio public schools showed students who were required to wear uniforms had improved graduation, behavior and attendance rates. Academic performance was unchanged.

    Some high schools in Texas have also joined in the movement. Yet studies find mixed results from requiring uniforms. And some schools have turned away from such policies.

    Supporters believe dressing the same creates a better learning environment and safer schools. The school district in Long Beach, California, was the first in the country to require uniforms in all elementary and middle schools. The example helped build national interest in uniforms as a way to deal with school violence and improve learning.

    Findings in Long Beach suggested that the policy resulted in fewer behavior problems and better attendance. But researcher Viktoria, who has looked at those findings, says they were based only on opinions about the effects of uniforms.

    She says other steps taken at the same time to improve schools in Long Beach and statewide could have influenced the findings. The district (the area marked by government) increased punishments for misbehavior. And California passed a law to reduce class sizes.

    In Florida, for example, researcher Sharon found that uniforms seemed to improve behavior and reduce violence. In Texas, Eloise found fewer discipline problems among students required to wear uniforms, but no effect on attendance.

    Sociologist David has studied school uniform policies since1998.He collected the reports in the book. In his own study, he found that reading and mathematics performance dropped after a school in Pennsylvania（宾夕法尼亚州）required uniforms.

    Political and community pressures may persuade schools to go to uniforms to improve learning. But David and others believe there is not enough evidence of a direct relationship. In fact, he says requiring uniforms may even increase discipline problems.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    A MENTORING (导师制) program is giving life changing opportunities to Banbury youth.

    Young Inspirations was founded two years ago to provide mentoring sessions for students and unemployed young adults aged 11 to 21.

    Alex Goldberg, the program's founder, said; "We set up Young Inspirations because we wanted to give young people experiences which will potentially be life changing and broaden their outlook.

    "We try to create work experience opportunities that will really make a difference to our youth. For example, we've secured internships (实习) with world-famous firms such as Honda.

    "At a time of funding cutbacks where schools are finding it more and more difficult to offer this kind of mentoring, it is extremely important that these opportunities are available both to help youth with their school work and grades and to give them opportunities which may help shape their futures. " Kieran Hepburn, 14, is one of a group of Banbury youth who has benefited from the program so far. In October the Banbury School pupil was accompanied by Young Inspirations staff to Paris where he was an observer at the United Nations Educational, Scientific and Cultural Organization's (UNESCO) International Youth Forum (论坛).

    The event was held for young people from around the world, to seek their views on how the future of youth and education should look. Kieran joined several hundred observers mostly in their 20s and was the only UK school pupil to attend the event. Kieran thinks the trip was a life changing experience. " Before we left I didn't quite know what to make of it but when we got there we didn't stop, it was amazing," he said, " We went to three or four hours of debates each day and then did something cultural each afternoon. "

    The main theme of the forum was how youth can drive change in political and public life. It dealt with issues (问题) such as drug abuse, violence and unemployment.

    Kieran said: " It has really helped me to improve my confidence and social skills as well as my school grades and I was voted most improved pupil at school in August. "

    The Young Inspirations mentoring sessions take place each Friday in Banbury. For details visit www.younginspirations.com.

    Looking for a great summer read? Kid reporters from Time For Kids have reviewed the season's hottest new books. They have recommended a list of kid-approved page-turners (令人爱不释手的书) to our readers. Whether you're fond of mysterious, fantastic or realistic fictions, there's always one that suits you.

    Three Bird Summer

    By Sara St. Antoine

    Genre: Realistic Fiction

    Number of pages: 256

    What's the basic story line?

    For his entire life, 12-year-old Adam has spent summers at his grandma's cabin in Minnesota. But this year things are different. His parents have divorced. Apart from that, Adam's cousins won't be vacationing at the cabin with him. Also, Grandma seems to be acting differently. At first, she's just a bit more forgetful than usual. But after spending more time with her, Adam realizes Grandma is “slipping.”

    There are new neighbors at the cabin this summer, including a girl at Adam's age named Alice. At first, Adam isn't interested in spending time with her. But as time goes by, their friendship flourishes(繁荣). Throughout this unusual summer, Adam searches for hidden treasure with his new friend and begins to uncover family secrets as well.

    Are the characters believable?

    The characters are believable because they don't have cookie-cutter(千篇一律的) personalities. Adam is quiet and shy and finds girls difficult to understand. Alice is adventurous and unlike any girl he has ever met. Readers will likely see aspects of their personalities in the characters and recognize their friendship too.

    Who would like this book?

    Anyone who appreciates memories of family vacations or summertime in general will enjoy the vivid imagination that fills ThreeBirdSummer. Readers will fall into the story, almost as if they're actually spending the summer exploring Three Bird Lake with Adam and Alice.

    Do you like air travel with a service dog? Air travel makes some people very nervous. The crowds, the noise and flying itself can cause unease. But there are classes people can take to help them defeat their fear of flying. And, let me introduce similar training for service dogs that suffer the same problem

    Service dogs almost never leave the side of the people they care for. You will see them working on buses, trains and other public transport systems. But the busy environment found at an airport can trouble even the best trained working dog.

    People with disabilities depend on their dogs. They want the animals to safely guide them through security areas. They also need the dogs to remain calm on duty on the plane, even when the flying is not smooth. This takes special training. The Air Hollywood K9 Flight School is one place where such help can be found.

    The school has a piece of equipment that provides the sights, sounds and even the feel of an airplane in flight. It is called a flight simulator, which was built for filming airplane scenes in movies.

    Sandy Alexander has a disability that requires his two-year-old dog, Doc, to be always at his side. Mr. Alexander took the dog to the flight school to get him ready for plane trips. He says Doc did not like the bumpy part of the flight simulation( 模拟).

    Dog trainer Mary Segall is with Canine Companions for Independence. It provides dogs for people with disabilities. Ms Segall says successful training is based on a simple rule: preparation.

    "Dogs need to be exposed gradually and repetitively to stimulation, to the environment, to loud noises, to sounds and to other dogs so that when this experience happens to them on a daily basis, they are able to act in a way that they're used to acting and that they don't get excitable."

    Dog owners who attended the training at Air Hollywood K9 Flight School say they now feel much more at ease about future flight. Their dogs also seem ready for take-off.

    My folks bought their first house in the early 1940s after Dad got a better job in Marquette, Michigan. We lived just inside the city limits in what was still a rural area.

    In the spring of 1948, when I was 6 years old, my parents bought a calf（小牛）to replace our cow, which had been killed the year before. So one day we drove to a local farm and returned with a white and brown calf we named Tubby.

    We didn't own a truck, so Tubby rode home in the backseat of Dad's car with my 9-year-old brother, Steve, and me. As you can imagine, the trip was a lot of fun for us kids.

    Later that summer, Mom thought it would be cute to take a picture of me sitting on Tubby's back. All went well until the snap of the camera shutter sent Tubby charging off on a run, with me holding on for dear life.

    I lasted for about 30 feet before I hit the ground. Mom was quick enough to shoot a follow-up picture, so we had photos of me both on and off Tubby!

    When summer had passed, the day arrived for poor Tubby to fill our freezer. I must have been somewhere else with my Mom on the fateful day, because I have no memory of how it happened. All I knew was that the barn was empty, and that we had plenty of meat for dinners.

    I hadn't lived on a farm like my mother, so I didn't understand that what happened to Tubby was not unusual. Livestock aren't meant to be pets, and most farm kids know and accept that truth.

    Whenever we had beef for dinner, I would tearfully, “Is this Tubby?” This went on for a couple of weeks until Dad had finally had enough and declared, “No more cows!” That made me feel a little better about poor Tubby.

    Life for almost anyone is increasingly influenced by screens. Not only are screens themselves cheap to make, but they also make things cheaper. Any place that can fit a screen in can cut costs. And any activity that can happen on a screen becomes cheaper. The physical experience of learning, living and dying is becoming smooth glass. All of this has led to a curious new reality: Human contact is becoming a luxury good (奢侈品).

    "What we are seeing now is the luxury of human engagement," Milton Pedraza, the chief of the

    Luxury Institute, said. Expected spending on experiences such as enjoyable travel and dining is outpacing spending on goods, according to his company's research, and he sees it as a direct response to the rapid increase of screens.

    Screens exposure starts young. And children who spent more than two hours a day looking at screen got lower scores on thinking and language tests, according to early results of a landmark study supported by the National Institutes of Health. The study focuses on brain development of more than 11,000 children. Most disturbingly, the study is finding that the brains of children who spend much time on screens are different. For some kids, their cerebral cortex (大脑皮层) would become thinner before expected time. In adults, one study found an association between screen time and depression.

    There is also the reality that in our culture of increasing separation, in which so many of the traditional gathering places and social structures have disappeared, screens are filling a vital gap.

    For normal people, running away from the screen becomes impossible. It's not a luxury, and it's easy to get. It is normal for more people to need the network constantly. In addition, it has become an important part of social interaction.