When Carson Palmer, a professional American football player, hurt his arm a few years ago, he took a week off from throwing the football. But in his head, Palmer practiced every day. The following weekend, Palmer had the best game of his life.

    For more than a century, scientists have been trying to understand how this mental training works. In the 1930s, researchers proved by experiment that when you're imagining an action, your brain sends signals to your muscles(肌肉) which are too weak to tighten the muscles but might help train the body to perform. In other words, mental practice might create a pattern in your head, like an inner how-to guide for a particular skill.

    Sports psychologists have conducted hundreds of studies comparing imagined and physical practice for actions. On the whole, the research shows that mental training works. A 2012 study, for example, compared 32 amateur golfers who practiced hitting the balls to another 32 who merely held a golf club in their hands and visualized（想象）their swings. Under the same training rules, both groups improved their skills by getting the ball about 4 inches closer to the hole.

    Visualization has advantages over the real thing: You can do it anywhere, even when injured. It is safe-a major plus for high-risk performers such as gymnasts and surgeons. And you can practice for longer periods of time because you're not restricted by physical tiredness, That's not to say it's easy, we've had Olympic-level athletes sitting in our lab, visualizing the movements for two hours," says Tadhg Macintyre, a sports psychologist at the University of Limerick in Ireland. “When we're done, they're absolutely tired.”

    It doesn't work for everyone, though. "If you're a novice, the effect can be harmful,” warns Macintyre. If you're trying to visualize a free throw, and you don't even know the proper movement, then you're probably going to mentally practice the wrong skill.”

    As computers become all the more popular in China, Chinese people are increasingly relying on computer keyboards to input Chinese characters. But if they use the computer too much, they may end up forgetting the exact strokes （笔画）of each Chinese character when writing on paper. Experts suggest people, especially students, write by hand more.

    Do you write by hand more or type more? In Beijing, students start using a computer as early as primary school. And computer dependence is more wide-spread among university students. Almost all their writings are typed on a computer.

    All the students interviewed say they usually use a computer.

    It's faster and easier to correct if using a computer. And that's why computers are being used more and more often to modern education. But when people are taking stock in computers increasingly, problems appear. "When I'm writing with a pen, I find I often can't remember how to write a character, though I feel I'm familiar with it."

    "I'm not in the mood to write when faced with a pen and paper."

    Many students don't feel this is something to worry about. Now that it's more convenient and efficient to write on a computer, why bother to handwrite?

    Many educators think differently. Shi Liwei, the headmaster of a famous primary school in the capital said "Chinese characters enjoy both practical and aesthetic(审美的) value. But those characters typed with computer keyboards only maintain their practical value. All the artistic beauty of the characters is lost. And handwriting contains the writer's emotion. Through one's handwriting, people can get to know one's thinking and personality.

    Beautiful writing will give people a better first impression of them."

    To encourage students to handwrite more, many primary schools in Beijing have made writing classes compulsory(必修的)and in universities, some professors are asking students to turn in their homework and essays written by hand.

Early or Later Day Care

    Many young parents are confused about whether their children should have early day care, and there have always been different views on this subject.

    The British psychoanalyst John Bowlby believes that separation from parents during the sensitive "attachment" period from birth to three may scar a child's personality and lead to psychological problems in later life. Some people have drawn the conclusion from Bowlby's work that children should not be subjected to day care before three because of the parental separation it causes, and many people do believe this.

    According to Bowlby, a great deal of psychological harm can occur when young children are separated from their parents. If they are left without touch for a while, they will have a higher stress level. Parents' influence on their children's well-being may never be greater than during the earliest years of life, when a child's brain is developing rapidly and when nearly all of her or his experiences are shaped by parents and the family environment.

    However, there are critics. Some anthropologists (人类学家) point out that the love affair between children and parents found in modern societies does not usually exist in traditional societies. There has been a long history of the fact that father and mother did not bring up their children alone. Plato, around 394 B.C., argued that a system of early child care would free women to participate in society. Results from Israeli and Dutch studies show that child-raising duties are more evenly distributed among a broader group of people.

    Besides, studies have reported that early day care has a neutral or slightly positive effect on children's development. They learn the benefits of being socially smart, understanding the concept of sharing and caring. They promote concentration skills, which is very important in their learning. There are games where children are taught basic language and mathematical skills through stories and everyday examples.

    Common sense tells us that early day care would not be so widespread if children had problems with it. But Bowlby's analysis raises the possibility that it has delayed effects. The possibility that such care might lead to more mental illness 15 or 20 years later can only be explored by the use of statistics. Whatever the long-term effects, parents sometimes find the immediate effects difficult to deal with. Children under three dislike leaving their parents and show unhappiness. At the age of three almost all children find it easy to go to the nursery. The matter, then, is far from being clearly known, though experience and available evidence indicate that early day care is reasonable for young children.

    On a recent trip to London, I decided to visit some exciting new restaurants that are using technology to change the way people dine out. My first stop was at an Italian restaurant in the city center. When I walked into the restaurant, I was given a tray (托盘)and a special card, but I had no idea what to do next! The manager came up to me and explained that I could swipe (刷) my card at any of the food and drink stations in the restaurant, and that the card would record my order. No waiters necessary! I made my selection and then handed my card to the cashier. Once I'd paid for my meal, I collected it and made my way to the dining area on the second floor. The food was very delicious, but, I must admit, I didn't enjoy having to carry my food up two flights of stairs.

    On the next night, a friend of mine suggested that we visit his favorite high-tech restaurant. When we arrived, I was surprised to discover that there were no paper menus; instead, the menus appeared on the touch screen surface of the table. All we had to do was touch our choices with our fingers and wait for the waiters to bring us our meal. The touch screen tabletop also allowed us to change different tablecloths and even play games. We had so much fun playing games that we hardly touched our food when it arrived--we really should have told the waiter to give us takeaways instead.

    On my last day in London, I decided to get some tapas from a Spanish takeaway near my hotel. I had heard that the owners had placed a webcam (网络摄像机) at the restaurant to allow their customers to watch the long lunchtime queue (队列) online. This came in very handy for me. While I packed my baggage, I kept an eye on the queue and then raced to the restaurant when the lunchtime rush was over. Without that wonderful webcam, I could have missed my plane.

At school, I was in the top set for maths. My teachers recommended that I study economics and statistics as my A-level subjects, but I had my mind set on a life fulfilled by the arts.

In fact, I was a victim of a gender stereotype made stronger since birth, that men do science and maths and women do arts or languages. Computer science, technology and physics just did not figure in my teenage world view. Nobody popular in my school chose to study those subjects.

Reality struck hard when I began attending job interviews and interviewers would say: "It's great that you speak foreign languages, but what else do you do?" Nobody asked my friends who had studied science or technology those questions.

A survey recently showed that three of the best-paid jobs for women are in the technology sector. It's a sector that really can change the world. We must show girls that technology has an effect on every industry out there, from fashion to architecture to journalism. Anybody can learn to code and these days it's as important as reading and writing. I've realized that at university I'd achieved the wrong kind of literacy. Not being able to code limit your impact on the world far more than an ignorance of great literature.

Now I have a five-year-old daughter. I don't want her to blindly follow gender roles the way I did. I want her to know the fact that a science or technical degree will not limit her creativity but expand it and broaden her horizons far more than my arts background could. I'm exposing her to Minecraft and apps, which help improve analytical thinking and problem solving skills. I'm hoping that my daughter will discover and accept her potentials in science and want to change the world.

Starting a club of some kind at school can be difficult. But with a good idea, some active friends, and the right knowledge, you can pull it off. {#blank#}1{#/blank#}.

Decide whether you really want to start a club. Once you have strong enough support from your friends and fellow students, you're ready to go.

{#blank#}2{#/blank#}. Find an advisor for your club. Pick someone who will help you organize events for your club.

Find a place. {#blank#}3{#/blank#} If you want to do this,  talk to your headteacher to apply (申请) for a classroom.

Decide when to meet. Decide how often your club should meet, and then pick a convenient time and day when most club members will be free.

Advertise your club at school. Make bright, colorful informative posters (海报) that will attract attention. {#blank#}4{#/blank#}.

Plan volunteering events. You can decide on events yourself, or hold a meeting to get your club's opinion. {#blank#}5{#/blank#}

Have fun. What's the point of having a club if it's no fun? Don't take yourself too seriously and be sure to have a sense of humor.