I had worried myself sick over Simon's mother coming to see me.I was a new teacher,and I gave an honest account of the students' work.In Simon's case,the grades were awfully low.He couldn't read his own handwriting.But he was a bright student.He discussed adult subjects with nearly adult comprehension.His work in no way reflected his abilities.

    So when Simon's mother entered the room.my palms（手掌心）were sweating.I was completely unprepared for her kisses on both my cheeks."I came to thank you,"she said,surprising me beyond speech.Because of me,Simon had become a different person.He talked of how he loved me,he had begun to make friends,and for the first time in his twelve years,he had recently spent an afternoon at a friend's house.She wanted to tell me how grateful she was for the self-respect I had developed in her son.She kissed me again and left.

    I sat,stunned,for about half an hour,wondering what had just happened.How did I make such a life-changing difference to that boy without even knowing it?What I finally came to remember was one day,several months before, when some students were giving reports in the front of the class,Jeanne spoke quietly,and to encourage her to raise her voice,I had said,"Speak up.Simon is the expert on this.He is the only one you have to convince,and he can't hear you in the back of the room."That was it.From that day on,Simon had sat up straighter,paid more attention,smiled more,and became happy.And it was all because he happened to be the last kid in the last row.The boy who most needed praise was the one who took the last seat that day.

    It taught me the most valuable lesson over the years of my teaching career,and I'm thankful that it came early and positively.A small kindness can indeed make a difference.

    When Veronika Scott was a student at the College for Creative Studies in Detroit, Michigan, she received a task to “design to fill a need.” She dreamed up an idea for overcoats that would double as sleeping bags, made 25 of them, and handed them out to people living in shelters on an abandoned city playground. While her efforts were greeted mostly with enthusiasm from those braving Detroit's cold winters, one woman voiced dissatisfaction. “We don't need coats; we need jobs,” she told Veronika. Then she had her second inspiration.

    After graduating from college in 2012, Veronika founded the Empowerment Plan, a nonprofit organization. She hired two homeless women to sew the coats and paid them with donations she received through her blog. Now, the Empowerment Plan employs about 20 people and has produced more than 10,000 coats and distributed them in 30 states, Canada, and elsewhere abroad.

    “We don't require previous employment,” Veronika says. “We're looking for people who are motivated.” The Empowerment Plan provides free classes and lends money to those who qualify. Nearly all the employees eventually move into permanent housing, and some go on to jobs in the auto industry and construction.

    Veronika has bettered the coat's design by making its outer layer of a lightweight material that resists air, wind, and water and its inner layer of a material that stores body heat. Still, Veronika is less focused on the coats than on the workers who make them. “At the end of the day,” she says, “the coat is a vehicle for us to employ people.”   

    David Rees runs a truly distinctive business. He charges customers $15 to sharpen their pencils to perfections, using a variety of tools.

    I know what you're thinking﹣is this a joke? The 39﹣year﹣old gets asked that question a lot. To clarify everything, he even created a special section on his website telling everyone he's actually providing a real service.

    You can supply your own pencil or you can have Rees sharpen one of his own favorite 2B pencils. After that, he mails it to you in a display tube with the shavings in a separate bag, and an authentic certificate which just happens to mention the pencil is so sharp as to be a dangerous object.

    To achieve the desired result, the master sharpener uses all kinds of tools, including general sandpapers, pocket knives and even a special $450 sharpening machine. "It depends on what the customer wants to use his/her pencil for," he says. "That determines the most appropriate pencil﹣sharpening technique. Some customers buy pencils as inspirational symbols while others buy them because of their special memories of classic 2B pencils."

    $15 to have a pencil sharpened is a bit expensive though, right？ You're not the only one who feels that way, and David's unique business has really angered lots of people, who talk of inequality in America, saying it is so insane for the wealthy to pay $15 to sharpen a pencil. But others will say, "This is just our urge to put an end to the welfare state because new ideas arise along with the business."

    David admits his trade is sort of unusual. But there are those who actually value his service, as proven by the over 500 orders he has gotten.

    Scientists in Western Australia claim to have made a new discovery—they have found gold in the leaves and twigs of trees. The researchers believe that the trees suck up the gold from deep underground, over 30 metres down. The discovery has been described as the first of its kind in the world. Australian gold exploration companies are pleased because it will make finding gold cheaper. Rather than drilling deep holes to find gold, they have more ways to examine tree leaves and branches. There is only a tiny amount of gold in the leaves. It would take 500 trees to make one gold ring. The gold is found using a special X-ray machine owned by an Australian government agency. A pure X-ray and a powerful microscope scan the leaves and branches.

    The claim that this is the first time that gold particles (微粒) have been found in living material might not be true, though. Ancient Chinese wisdom understood the connection between plants and the precious stones and minerals underneath them. They used plant life to find minerals and that was thousands of years ago. In the Zhou Dynasty, it was written in a book that a certain plant grew only near deposits of gold. Over the next 2,000 years, Chinese people wrote about different plants and how they grew, showed where minerals and precious stones such as jade, copper, lead, silver and gold were.

    Even more importantly, in the 1, 000s, Su Song described how copper, gold, silver, lead and tin were observed and taken from certain plants. These were amazing scientific discoveries. Meanwhile, this knowledge was unknown in the rest of the world until about 1, 600. This was when a British man realised that oak trees grew larger and greener where there was alum (明矾) in the ground. Maybe ancient Chinese has more knowledge to teach modern scientists.

    Sit down, close your eyes and relax. Think about your childhood and the memories you created. What was your favorite childhood memory and what was your favorite as a child? Or what your favorite Christmas present or your favorite candy bar when growing up? Answers may come easily for some people but for others, it may take more time to think about.

    Mary Jo McCarthy of Pequot Lakes wants to help others document their childhood memories which could be treasured by current families and for generations to come. McCarthy, 64, a short story author and retired columnist (专栏作家) for the Lake Country Echo weekly newspaper, began hosting a writing seminar (研讨班) titled "A Time to Remember". The closes are limited to 12 people and are conducted in the nursery at Lutheran Church of the Cross in Nisswa and the registration fee is $25.

    McCarthy said what led her to start the writing seminars was writing others' biographies(传记). A retired businessman asked her to write his biography as a ghost writer. She said others from her church in Pequot Lakes had also asked her to write their biographies because they didn't know how to write them. She thought hosting a class to help people write their own biographies would be more beneficial to them.

    McCarthy said people had busy lifestyles those days and didn't have a chance to sit down and write down their memories that they might forget and never remember. She said writing down the memories would document the person's life, so other family members, especially future generations would be able to read about them.

    A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    "It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件)," said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. "The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own," he said.

    They engineered a series of systems to start and drive the robotic fly. "The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it's connected to," said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. "Basically it should be able to take off, land and fly around," he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. "You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead," he said. "So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis."