In America, when the eighth graders leave the middle school, they are often worried about moving to the high school．It is a hard time for them, but it can be an exciting one as well．To make it easier, students need to get familiar with their school.

    Even though they've done this already in the middle school, it's still important to find where their classrooms are．Most schools take students to the high school for a visit at the end of their eighth grade year．And, most schools also have a freshman (新生) speech for parents and students before the first year begins．Sometimes the main office will give away a map of the school．This can help students and parents to find different places in the school.

    One way to know your high school more and make new friends is to join a club or play a sport．Schools often offer chances to join different clubs and sports．Fall activities begin in August before the first day of school．If you are not interested in sports, there are clubs for any interest, such as drama, dance, chess, photography, community service, etc．These clubs allow students from different grades．By joining an activity, students can find new friendships, not to mention improving their chances in future college applications(申请)．The school office will have a list of activities offered at the school and information on how to join them.

    What's more, to have a great start to a high school year, students can write down some of their worries, and ask for help from teachers and school workers.

    We considered a list of the best American books — but we'd need a whole issue to do them justice. Here are 5 that helped define the national character. Most from a century or so ago, they still entertain, teach and inspire American people.

    Moby-Dick by Herman Melville

    First published in 1851, the book tells the adventure stories of Captain Ahab and his continuous hunting for the white whale and draws us into a universe full of fascinating characters and stories.

    The Education of Henry Adams by Henry Adams

    Awarded the Pulitzer Prize in 1918, the book provides insight into Adams' family, including his experience as a private secretary to his father, minister to England during the American Civil War.

    Leaves of Grass by Walt Whiteman

    When Whiteman published Leaves of Grass in 1855, he wanted to define the American experience— sing for the new country in a new voice, reflecting the great changes in the American literary world that had taken place during his lifetime.

    Poems by Emily Dickinson

    An enthusiastic poet whose works have had a considerable influence on modern poetry, Dickinson's frequent use of dashes(破折号)，sporadic(零星的)capitalization of nouns, and unusual metaphors(隐喻) has contributed to her reputation as one of the most innovative poets of the 19^th-century American literature.

    The song of Hiawatha by Henry Wadsworth Longfellow

    First published in 1855, this is Longfellow's most popular and most recognized poem, showing the heroic life and death of a magic American Indian sent by the Great Spirit to guide the nations in the ways of peace.

    It was a dark and stormy night. I was about to go to bed when I heard a tapping sound on my window.

"Who's there?" I shouted. Suddenly there was a flash of lightning; I saw a face at the window. It looked like an alien（外星人）— an alien that I had seen on the television show, "the X files".

    I felt very scared. I ran to my bed and pulled my blanket over my head. I started to shout for my parents but there was no reply. Then I remembered that they were at a fancy dress party.

    I looked out of my blanket but it was too dark to see anything. Then I heard footsteps. They were getting louder and louder. I ran to my drawer to take out my camera and started to take pictures in the direction of the window. Soon the footsteps died off.

The grandfather clock struck. It was 12 midnight. I went back to my bed and tried to sleep. But I could not sleep. I felt too frightened. I sat up, and my mind was full of thoughts. Time passed — finally, I fell asleep.

    I woke up only after eight and decided to find out what it had been. I found some footprints outside my bedroom window. I measured them with a ruler and found them to be exactly the same size as my father's shoes. I then went to town to get the film developed. I didn't realize that I did not use the flash until I saw the black photos.

    When I reached home, I told my father the whole incident and he started to laugh. I started laughing too when he told me that he had dressed up as an alien for the party. Today, I am still amused to think I was so afraid of my own father.

    A lot of kids have dreams they will never achieve due to the limitations of their little bodies. They want to fly, or to become a dinosaur, or to learn how to shoot webs out of their fingers like Spiderman.

    Luka Tavcar, 12, has muscular dystrophy(萎缩) and is totally dependent on his wheelchair. Nevertheless, late last year, he had an inspired plan: to be photographed walking around and having fun.

    He approached Matej Peljhan, an amateur photographer and a psychologist at CIRIUS rehabilitation(康复) center near Ljubljana, Slovenia, where Luka is a patient.

    At first, Peljhan was perplexed. How could he photograph a boy who can not move or act in motion? "Luka wanted to see himself playing and having fun, but it seemed impossible," he says.

    Then Peljhan had a brainstorm: Luka could lie down on a piece of cloth and, with the help of an assistant, Peljhan would pose the boy as if he were jumping, climbing stairs, moving downhill on a skateboard, and playing basketball. Then Peljhan would shoot these images from above. The photos took about a month to produce; all were shot early this year.

    Peljhan, who lost his right arm and left eye as a child, says his disabilities motivated him to make the photographs. "I understand people with limitations," he says.

    He named the series the little Prince after the French story by Antoine de Saint-Exupery in which a boy teaches a man about trust, hope and friendship. Luka loves the photos.

    Peljhan himself understands what it is like to live with limitations- he lost his right arm and left eye as a child. "He wants to stay positive," the photographer explains. "Luka's imagination helps him forget his phisical limitation", says Peljhan. "He's fragile, but he can see the world differently."

    With golden sunshine and a gentle breeze（微风）, autumn is the most beautiful seasons in the year. This is a great time to go outside and have fun. Go to a valley to see red maple trees, go and pick fruit in an orchard or find an open field to fly your kite in.

    However, for many high school students, these great activities may be just a dream. With plenty of work to do, they spend all their hours indoors, struggling for a high mark in their exams. Of course, study is one of the most important things for teenagers. But life is definitely much more than that.

    Sometimes we spend so much time studying that we forget how to make life wonderful. In doing so, we lose the real purpose of life —to be a valuable and happy person. To enjoy just how great it is to be alive, we have to put down our books and pens and look around us. Students, take some exercise to improve your health, talk with your parents and friends for understanding and walk around outside to refresh（振作）our body and mind.

    Going out and enjoying the beautiful countryside often helps our creativity in our work. Chinese craftsman, Lu Ban created a saw to help woodworkers. But if he hadn't walked outside, he would not have been inspired by a kind of toothed（锯齿状的）grass. We could also suppose if Newton hadn't rested under that apple tree, then he wouldn't have been hit by an apple, and his classic（经典的）theories would not have come out.

    Going out is not only a break from hard work, but a chance to add to life experience. So come on, give your brain a good rest. Step out of the books and get your bag ready for an autumn outing. We are sure you will get much more than knowledge from the exciting journey.

    A new study suggests climate conditions in the Sahara Desert, one of hottest, driest and most deserted areas in the world, have changed from wet to dry a about every 20,000 years.

    But previous evidence has suggested the Sahara did not always experience such extreme heat and dry conditions. At times, the Sahara Ranged to a very wet climate. This permitted plants and animals to develop and grow and led to the creation of human settlements. Now, they have discovered more evidence, which, the lead researcher David Mc Gee says, supports the idea that the Sahara's climate kept changing between wet and dry about every 20,000, years.

    McGee reported these climate changes were mainly driven by changes in the Earth's(地轴)as the planet travels round the sun .This process affects the amount of sunlight between seasons. Every 20,000 years the Earth receives more strong summer sunlight. When the Earth's axis changes again, the amount of sunlight is reduced. This season change happened continuously every 20,000 years. The other part of the season produced rainy conditions, resulting in a wetter, greener, plant-rich environment. When the rainy activity weakens, the climate becomes hot and dry, like the Sahara remains today.

    The scientists based their research on dust collected from ocean sediment(沉积物)in the Atlantic Ocean bottom off the coast of West Africa. The dust contained layers (层)of ancient sediment built up over millions of years. Each layer could contain traces of Saharan dust as well as the remains of life forms. This information was used to assess over what time period the dust had built up. This led to the overall finding that the Saharan changes from wet to dry climates happened every 20,000 years.

David McGee said that today we only see the Sahara Desert as an extremely deserted and "inhospitable" place. The new study suggests that the area's climate has changes between grasslands and a much wetter environment, and back to dry climates, even over the last quarter million years. McGee says he thinks the latest research can be valuable in studying the Sahara's history as it relates to human settlement.