First Lady Michelle Obama is a big fan of volunteering. Volunteering means working for free to help someone else. Mrs. Obama says volunteering is very important. “It should be part of everyone's life,” she says.

    Many teens agree. They say that helping others feels great and makes a difference. These days, more teens volunteer than work for pay. Teens clean up parks, walk dogs at animal shelters, visit the elderly and more.

    Some cities —including Seattle, Chicago, and Washington, D.C. —require high school students to volunteer. Students must volunteer in order to graduate. The student volunteers learn new skills and help their communities.

    Many parents are in favor of the idea —they say volunteering helps teens build job skills. But most teens don't want to be forced to volunteer. They say they are busy. And they say volunteering is only fun if it's a choice.

Read both sides of the debate and decide.

YES

Volunteering can help teens get into college or get a job.

Many cities and towns need help. Volunteers can help keep important programs going.

Not all teens will volunteer if it isn' t required. Schools should require students to do all they can to get ready for adult life.

NO

Most teens are already very busy with classes, homework, jobs and sports. Forcing them to do more isn't fair.

It should be up to each person. Helping out doesn't feel as good if you have to do it.

Finding a volunteer job isn't always easy. Students shouldn't be kept from graduating because of something they can't control.

    A disease called “Panama” is threatening supplies of the world's most popular fruit—banana.Two years ago,the United Nations warned that the "Panama disease" could destroy "much of the world's banana crop."Since then,things have not gotten better.A new outbreak was discovered last year in Australia.The disease started in Asia in the 1990s, and later spread to Africa and the Middle East.

    World health officials worry the disease could travel to Latin America,one of the top banana producers in the world.All this is a big concern because bananas are an important source of income and nutrients for millions of people.They are grown in 135 tropical nations.The United Nations lists bananas as one of the most important foods, along with rice,wheat and corn.

    Randy Ploetz is a professor at the Tropical Research & Educational Center at the University of Florida.Many consider him as America's top banana expert.As he explained,Panama disease affects the Cavendish banana.The Cavendish is one of more than 500 kinds of bananas.But it is the most popular.

    “The industry is waking up to the problem,”Ploetz said.“They are pretty scared.”He was speaking Thursday by telephone from Miami,Florida,where he is among 1,000 people attending the International Banana Congress.The meeting was supposed to take place in Costa Rica,but was moved at the last minute.There were concerns banana growers could spread Panama disease from dirt collected on their shoes,Ploetz said.

    Ploetz said reports that Cavendish banana production could end are not correct.But if the disease spreads to Latin America,it could hurt the world's economy along with food supplies for millions of people.Still,he said there is reason for hope.Scientists in Australia are working on a genetically engineered banana that might not be at risk of getting Panama disease.

    Courses Available at North Coast College Campuses

    Agriculture

    Specialist agriculture centres of the North Coast College offer courses ranging from agricultural skills to beef production, horse studies and rural management. The Wollongbar Campus is famous for its Tropical(热 带的) Fruit Growing program and has introduced courses on bush foods and coffee production. Taree offers the Veterinary(兽医的) Assistant program and has introduced “Agristudy”, which enables students to learn flexibly and by correspondence( 函 授 ), using a mixture of student learning guides, telephone tutorials, information sessions and workshops. Mullumbimby has the popular Rural Business Management program, which can also be studied by correspondence. Grafton, meanwhile, offers traineeships in agriculture including beef and dairy.

    Health Programs

    The continued improvement of healthier living within the community has seen an increase in fitness awareness and a need for trained staff in the Fitness and Sport industries. Fitness Instruction courses are offered at Tweed Heads and teach students how to keep healthy and lead a safe fitness program.

    Lismore offers the Aged Support program and Port Macquarie offers the Early Childhood Nursing program. These courses give you the theoretical skills, knowledge and practical experience needed to work in a variety of residential and community-based health care institutions. For students interested in working in the Medical Health Care industry, Kingscliff is a specialist centre for the Natural Therapy Diploma and has a health clinic on campus.

    Environmental Studies

    The Environmental Studies courses offered by the North Coast College have been developed to help students increase their awareness and understanding of environmental issues and to enable them to determine their environmental impact. The Environmental Practice course, which includes Coastal Management, is offered through the Ballina Campus.

    For people interested in working to protect natural forests, the North Coast College offers the Forest Protection course at Casino. This course can provide a pathway for students into the Natural Resource Management Diploma at university.

    Throughout history scientists have risked their health and their lives in their search for the truth.

    Sir Isaac Newton, the seventeenth century scientist, was very smart, but that didn't stop him from doing some pretty stupid things. In his laboratory in Cambridge he often did the strangest experiments. Once, while testing how light passes through lenses (晶状体), he put a long needle into his eye, pushed it to the back, and then moved it around just to see what would happen. Luckily, nothing long-lasting did. On another occasion he stared at the sun for as long as he could bear, to discover what effect this would have on his sight. Again he escaped suffering permanent damage, though he had to spend some days in a darkened room before his eyes recovered.

    In the 1750s the Swedish chemist Karl Scheele was the first person to find a way to produce phosphorus (磷). He in fact discovered eight more chemical elements including chlorine (氯), though he didn't get any praise for them. He was a very clever scientist, but his one failing was a curious habit of tasting a little of every substance he worked with. This risky practice finally caught up with him, and in 1786 he was found dead in his laboratory surrounded by a large number of dangerous chemicals, any of which might have been responsible for his death.

    Eugene Shoemaker was a respected geologist. He spent a large part of his life studying craters (火山口) on the moon, and how they were formed, and later did research into the comets of the planet Jupiter. In 1997 he and his wife were in the Australian desert where they went every year to search for places where comets might have hit the earth. While driving in the Tanami desert, normally one of the emptiest places in the world, another vehicle crashed into them and Shoemaker was killed on the spot. Some of his ashes (骨灰) were sent to the moon aboard the Lunar Prospector spacecraft and left there — he is the only person who has had this honor.

When Jenny Benson was eight, her mother took her to soccer practice for the first time.

"She's never played soccer before," Mrs Benson told the coach. "I'm not sure how she'll do. "

Jenny ran onto the field and joined the other players. Over the next hour, Mrs Benson and the coach watched as Jenny outran many of the more experienced players.

"I knew then that soccer would be Jenny's sport. " Mrs Benson recalls. And she was right.

It may have helped that Jenny had spent much of her time trying to keep up with her three brothers. "I wanted to be just like them," Jenny says. "My family has inspired me for my entire life. "

Jenny has retired from the United States women's national soccer team. She started out on her professional career in the Philadelphia Charge, a team in the Women's United Soccer Association (WUSA). Later on, she joined FC Energy Voronezh, and then New Jersey Wildcats.

When the WUSA was being formed, league officials watched many college soccer games, looking for players good enough to join the league. They were very interested in Jenny, who played for the University of Nebraska.

"Throughout that college season, I knew I was being watched," Jenny says, "I knew I couldn't be perfect, so I just tried to be very consistent and have fun. "

As a professional, Jenny relied on her focused but funloving attitude. "In a game, I try never to put too much pressure on myself. The more I concentrate on having fun, the better I play. " She says. "I have good and bad days, just like everyone else, but I know the sun will always come up after a bad day. So all I have to do is to adjust myself, either to the change of my inner feelings or to the change of circumstances. That helps me get through anything. "

Lanrick Jr. Bennett holds a unique title in Toronto: bicycle mayor. He led a Halloween Kidical Mass ride recently, which I attended with my daughter, son-in-law, their two dogs, and my granddaughter. He is working towards making cycling mainstream and safe for all residents in the city. I did not know that Toronto had a bicycle mayor; I surely would have voted for him in an election.

The bicycle mayor program is run by BYCS, an Amsterdam-based global NGO that believes "bicycles transform cities and cities transform the world". Standing in the strange but wonderful Bentway, a park built under an elevated expressway, Bennett says, "BYCS has 150 bicycle mayors across the world. And through a few friends putting in some really nice letters of encouragement, BYCS offered me a two-year term as an advocate here in the city of Toronto, becoming the first bicycle mayor of the city."

Bennett says he is boosting the work being done to make cycling more mainstream in Toronto. "I am giving a bit more exposure to the great work that has allowed me to be able to ride a bike throughout the city. It's getting better, we're seeing more infrastructure（基础设施）, and we're seeing more people not wanting to depend on cars as their primary piece. I'm happy that I have been part of a fantastic group thus far," says Bennett.

Since there's still a lot of work to do, Lanrick Jr. Bennett has been working hard to improve cycling conditions in Toronto, and his efforts have been recognized by the community. He has been advocating for more bike lanes（车道）, better lighting, and other safety measures to make cycling a practical option for commuters（通勤者）. It's great to see people like Lanrick

Jr. Bennett working towards making cycling safe and accessible for all residents.