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.

    Parents who help their children with homework may actually be bringing down their school grades. Other forms of parental involvement, including volunteering at school and observing a child's class, also fail to help, according to the most recent study on the topic.

    The findings challenge a key principle of modern parenting(养育子女) where schools except them to act as partners in their children's education. Previous generations concentrated on getting children to school on time, fed, dressed and ready to learn.

    Kaith Robinson, the author of the study, said, "I really don't know if the public is ready for this but there are some ways parents can be involved in their kids' education that leads to declines in their academic performance. One of the things that was consistently negative was parents' help with homework." Robinson suggested that may be because parents themselves struggle to understand the task." They may either not remember the material their kids are studying now, or in some cases never learnt it themselves, but they're still offering advice."

    Robinson assessed parental involvement performance and found one of the most damaging things a parent could do was to punish their children for poor marks. In general, about 20% of parental involvement was positive, about 45% negative and the rest statistically insignificant.

    Common sense suggests it was a good thing for parents to get involved because "children with good academic success do have involved parents ", admitted Robinson. But he argued that this did not prove parental involvement was the root cause of that success." A big surprise was that Asian-American parents whose kids are doing so well in school hardly involved. They took a more reasonable approach, conveying to their children how success at school could improve their lives."

    No one can deny that buttons are an important clothing device. But, can they rise to the level of art? Organizers of an exhibit in New York City think so.

    Peter Souleo Wright organized “The Button Show” at Rush Arts Gallery in the Chelsea neighborhood of Manhattan. Eleven artists used the small, ordinary objects to create sculptures, portraits and wearable art. Some of the works are political, some are personal and others are just fun.

    Wright said each artist reimagines and repurposes the buttons to make art. “What I tried to do with this show,” he said, “was to look at artists who were promoting that level of craft.”

    He said he wanted the button art to be comparable to a painting “because of the amount of detail and precision in the work.”

    Artist Beau McCall produced “A Harlem Hangover”. It looks like a wine bottle that fell over on a table. A stream of connected red buttons hand over the side, like wine flowing down. Similar red button form a small pool on the floor.

    McCall layers buttons of different shapes and sizes to create the bottle. The stitching that holds them together is also part of the artistic design.

    For San Francisco-based artist Lisa Kokin, buttons are highly personal. After her father died in 2001, she created a portrait of him using only buttons. That memorial to her father led to other button portraits, including those of activists Rosa Parks and Cesar Chavez.

    Others use buttons for details. Artist Amalia Amaki of Tuscaloosa, Alabama, placed them on and around old photographs. Los Angeles artist Camilla Taylor attached buttons to three large sculptures that look like headless animals with long, narrow legs.

    “The Button Show” ends at March 12. The Rush Philanthropic Arts Foundation paid for the exhibition. The foundation was created in 1995 by the Simmons brothers: artist Danny, hip-hop producer Russell and rapper Rev. Run. The foundation seeks to bring the arts to urban youth and to provide support for new artists.

    Grown-ups are often surprised by how well they remember something they learned as children but have never practiced ever since. A man who has not had a chance to go swimming for years can still swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the words for years can teach her daughter the poem that begins “Twinkle, twinkle, little star” or remember the story of Cinderella or Goldilocks and the Three Bears.

    One explanation is the law of overlearning, which can be stated as follows: Once we have learned something, additional learning experiences increase the length of time we will remember it.

    In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing baseball long after we have learned them. We continue to listen to and remind ourselves of words such as “Twinkle, twinkle, little star” and childhood tales such as Cinderella and Goldilocks. We not only learn but overlearn.

    The multiplication tables (乘法口诀表) are an exception to the general rule that we forget rather quickly the things that we learn in school, because they are another of the things we overlearn in childhood.

    The law of overlearning explains why cramming (突击学习) for an examination, though it may result in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn the subject well enough to get by on the examination, but he is likely soon to forget almost everything he learned. A little overlearning, on the other hand, is really necessary for one's future development.

    For many families, a night at the ballpark is a treat. But it can be a terrible experience for those with autistic(自闭症的)children, who are sensitive to light and noise and usually become upset and scared.

    For these families, fear of how their child will react to new situations­and how others will react to them-keeps them from gaining everyday experiences others get to have.

    Dr. Wendy Ross was heartbroken to see that. The pediatrician(儿科医生)in Philadelphia also knew that separation from the community didn't serve her patients well in the long run.

    "If kids are not in the community, building their skills from very young ages, then there's no reason to expect them to be independent one day," Ross said. "It's a social disability. It needs to be addressed in a social setting."

    So in 2007, Ross set out to do just that. Today, her nonprofit, Autism Inclusion Resources, helps families affected by autism deal with challenging social situations, such as sporting events, airport travel and museum visits.

    Many Major League Baseball teams hold annual 44autism awareness nights", when they take temporary measures such as lowering the volume (音量)on the public address system. But Ross wanted to do more. "You can't turn down the volume of the world," Ross said. "It's nice to do it for one night, but our goal is for families to be able to go to a game on any night."

    To that end, Ross partnered with the Philadelphia Phillies to develop a creative program.

    She armed all the Phillies players and game-day staff with knowledge about autism and how to interact with individuals who have the disorder. Each family is also provided a clinician at the game who gives additional support if problems arise. She also helps prepare the families for the event.

    Ross has also found her airport travel program to be successful for families. Using the same principles, she trains airline and security staff at major airports and then guides families through the travel experience, including checking in, going through security and boarding a plane.

    Ross hopes that the tools she gives families can help them explore other settings on their own. "We really see it as a stepping stone to a brighter future," she said.

Scientists at the Department of Energy's Lawrence Berkeley National Laboratory and the California Institute of Technology have-in just two years-nearly doubled the number of materials known to have potential for use in solar fuels.

They did so by developing a process that promises to speed the discovery of commercially viable (商业可行性) generation of solar fuels that could replace coal, oil, and other fossil fuels.

Solar fuels, a dream of clean-energy research, are created using only sunlight, water, and carbon dioxide. Researchers are exploring a range of possible target fuels, but one possibility is to produce hydrogen by splitting water.

Each water molecule (分子) consists of one oxygen atom and two hydrogen atoms. The hydrogen atoms are extracted, and then can be reunited to create highly flammable hydrogen gas or combined with CO 2 to create hydrocarbon fuels, creating a plentiful and renewable energy source. The problem, however, is that water molecules do not simply break down when sunlight shines on them-if they did, the oceans would not cover most of the planet. They need a little help from a solar-powered catalyst (催化剂).

To create practical solar fuels, scientists have been trying to develop low-cost and efficient materials that perform the necessary chemistry using only visible light as an energy source.

A new method was developed through a partnership between the Joint Center for Artificial Photosynthesis (JCAP) and Berkeley Lab's Materials Project, using resources at the Molecular Foundry and the National Energy Research Scientific Computing Center (NERSCC). JCAP focused on developing a cost-effective method of turning sunlight, water, and carbon dioxide into fuel. It is led by Caltech with Berkeley Lab as a major partner. The Materials Project is a program based at Berkeley Lab that aims to remove the guesswork from materials design in a variety of applications.

"What is particularly significant about this study, which combines experiment and theory, is that in addition to identifying several new compounds for solar fuel applications, we can also learn something new about the basic electronic structure of the materials themselves." says Neaton, the director of the Molecular Foundry.