The kids in this village wear dirty, ragged clothes. They sleep beside cows and sheep in huts made of sticks and mud. They have no school. Yet they all can chant the English alphabet, and some can make words.

    The key to their success : 20 tablet computers(平板电脑) dropped off in their Ethiopian village in February by a U.S. group called One Laptop Per Child.

    The goal is to find out whether kids using today's new technology can teach themselves to read in places where no schools or teachers exist. The Massachusetts Institute of Technology researchers analyzing the project data say they're already amazed. “What I think has already happened is that the kids have already learned more than they would have in one year of kindergarten,” said Matt Keller, who runs the Ethiopia program.

    The fastest learner—and the first to turn on one of the tablets—is 8-year-old Kelbesa Negusse. The device's camera was disabled to save memory, yet within weeks Kelbesa had figured out its workings and made the camera work. He called himself a lion, a marker of accomplishment in Ethiopia.

    With his tablet, Kelbasa rearranged the letters HSROE into one of the many English animal names he knows. Then he spelled words on his own. “Seven months ago he didn't know any English. That's unbelievable,” said Keller.

    The project aims to get kids to a stage called “deep reading,” where they can read to learn. It won't be in Amharic, Ethiopia's first language, but in English, which is widely seen as the ticket to higher paying jobs.

    When we're in need, we always turn to our parents for help. But would you like them to hear the conversations you have with your friends on the school playground or lunch queue? Social networking sites have become extensions (延伸) of the school hallways, so would you add your parents as “friends” and allow them to view your online activities and conversations with friends?

    In the past the generation gap included a technology gap, where children were up to date with latest technology and parents were left behind, content to continue their day to day lives as they always had because they had no need to know more about technology. However, more and more parents are beginning to realize just how important social networks are in their lives. This realization has given many parents the motivation to educate themselves about social networking sites.

    These days many people are attracted to social networking sites because they can choose who they have around them; there's also a certain amount of control over privacy that we don't get in real life. Sometimes we feel that privacy is violated (侵犯）when we must accept a “friend” request from a parent or family member.

    It's a difficult choice whether or not to allow a parent to become a part of our online lives. On the one hand we don't want to “reject” their request because that might hurt their feelings or make them feel you have something to hide. On the other hand if you do accept, then you could have a sense of being watched and no longer feel free to comment or communicate the way you did before.

    A recent survey suggested that parents shouldn't take it personally if their child ignores their request: “When a teen ignores a parent's friend request, it doesn't necessarily mean that they are hiding something, but it could mean that this is one part of their life where they want to be independent.”

    Perhaps talking with parents and giving explanations would help soften the blow if you do choose not to add them to your friends list.

    When my son was about five or six, I traveled a lot on business. I worried all the time about what the absence might mean to him. I knew how important it was for a boy to have his father near. When I was small, the times I loved most were the special moments I shared with my father. I cherished these special moments and, to this day, hold those memories dear. I decided to create those kinds of special times for my son.

    In one of my letters home, I promised my son that I would teach him how to fly a kite and that we could go to a nearby beach and fly it as high as it would go. Through my travels I would pick up things for our kite adventure and send them to him. In my trip to Japan, I found the most beautiful blue silk with gold threads（线）woven through it. Perfect kite materials! I sent it home with a picture book that would serve as a weight.

    When I got home at night, I found him sleeping sound, surrounded by all the items I had sent him for our kite. For the next week, we started to work on our masterpiece. We had our time together in the garage, after dinner. Finally, it was finished. The blue silk made it so beautiful. He was obviously eager to fly it soon. “We'll fly it tomorrow, right, Dad?” “Yes, if the weather is right,” I explained that we needed wind to lift the kite off the ground. I was afraid that it might rain. “We'll fly it because I'm going to pray with all my heart for the best kite weather.” He was right. I will never underestimate（低估）the power of a child's prayer any more.

    My son is a dad now, with children of his own. Though we are both busy, we still try to make time for each other. The other day, we met for coffee. While paying for our coffee, his wallet dropped on the ground and something fell out. Suddenly, a flood of memories washed over us as he put back his treasure into wallet—the blue silk with gold threads woven through it.

    Some of the world's most significant problems never hit headlines. One example comes from agriculture. Food riots（暴动）and hunger make news. But the trend lying behind these matters is rarely talked about. This is the decrease in the growth in production of some of the world's major crops. A new study by the University of Minnesota and McGill University in Montreal looks at where, and how far, this decline is occurring.

    The authors take a vast number of data points for the four most important crops: rice, wheat, corn and soyabeans. They find that on between 24% and 39% of all harvested areas, the improvement inproduction that took place before the 1980s slowed down in the 1990s and 2000s.

    There are two worrying features of the slowdown. One is that it has been particularly sharp in the world's most populous countries, India and China. Their ability to feed themselves has been an important source of relative stability both within the countries and on world food markets. That self-sufficiency (自给自足) cannot be taken for granted if productions continue to slow down.

    Second, production growth has been lower in wheat and rice than in corn and soyabeans. This is problematic because wheat and rice are more important as foods, accounting for around half of all calories consumed. Corn and soyabeans are more important as feed grains. The authors note that "we have preferentially focused our crop improvement efforts on feeding animals and cars rather than on crops that feed people and are the basis of food security in much of the world."

    The report also states the more optimistic findings of another new paper which suggests that the world will not have to dig up a lot more land for farming in order to feed 9 billion people in 2050, as the Food and Agriculture Organisation has argued.

    Instead, it says, thanks to slowing population growth, land currently ploughed（犁）up for crops might be able to revert (回返) to forest or wilderness. This could happen. The trouble is that the prediction assumes continued improvements in productions, which may not actually happen.

    It has been described as art by some people, but to others it's an ugly part of modern life. What is it? Graffiti (涂鸦), of course. Look around cities in the UK today and you can see graffiti on buildings, walls, doors and even on buses or trains that have stayed in one place for too long. But where modern technology creates a problem, it also finds a way to deal with it. Last week, The Weekend West was shown around the factory of a small but successful company, Hubdean.

    Hubdean's achievement is a series of special paints which are graffiti-resistant. How do they work? It couldn't be simpler. Take any graffiti-covered surface. First, a treatment called Agproclear is used. Then, using a very hot pressure jet (压力喷嘴), this treatment is taken away and the graffiti disappears at the same time. Now you have a clean wall. But before this clean wall can be painted on by graffiti lovers, a new product, Agproshield, is used. This paint has a special surface which gives it two important advantages. Firstly, spray paint (喷雾颜料) won't stick to the surface very well, and secondly, the whole surface can be cleaned very easily, just using water. Once the surface is painted, no specialist equipment is needed to keep the area clean and graffiti-free.

    Not surprisingly, Hubdean's products are used by both local governments and private companies all over the UK, and now orders are being received from around the world. This brings the company a problem, however. Can they increase production to satisfy the needs? Of course, they can build a second factory or work with a large international company to make their products. The future is looking good for Hubdean!

The year was 1937. I was seven years old. And I was with my father and mother, at a Chinese restaurant in Boro Park, Brooklyn. That was the first Chinese restaurant I ever ate at. I was always given food from the adults' orders.

I'm not sure when it was, but the time did come when I had my first order — Won-Ton soup, egg rolls and spare ribs. That made me excited. My father seemed to know the Chinese waiter, a young guy; his name was Jimmy. I remember being surprised that a Chinese man could have an American name.

Some months later, my father took me to a restaurant in Manhattan's Chinatown called The Rathskeller on Mott Street. This was my first time in Chinatown and I was very impressed by how different it was from Boro Park. We went there a few times. I just couldn't have enough of the food there.

In 1951, I was sent to work in the Hospital Treasurer's Office at Letterman Army Hospital. A colleague had an uncle who was a waiter at The Far East Cafe on Grant Avenue in the heart of San Francisco's Chinatown. Once a week, a group from the office would go there for lunch and my colleague's uncle would take good care of us. My favorite dish was Tomato Beef Chow Mein.

It wasn't until about 23 years later, in 1974, that I had my next serious relationship with the cuisine (菜肴) of China. I was lucky to take some cooking lessons provided by a famous Chinese restaurant's chef. Then my life entered a new phase (阶段). I didn't know it then, but some time later, it became clear to me that Chinese food would follow me through the days of my life.