Obama, Lady Gaga and Steve Jobs—what do they have in common? They are, of course, all Americans. And according to a survey by social networking site baidu. com, they all best illustrate(举例说明) the word “cool”.

    But just what does it mean to say someone is “cool”? Most would answer that it is something to do with being independent-minded and not following the crowd.

    Yale University art professor Robert Farris Thompson says that the term “cool” goes back to 15th century West African philosophy. “Cool” relates to ideas of grace under pressure.

    “In Africa, ” he writes, “coolness is a positive quality which combines calmness, silence, and life.”

    The modern idea of “cool” developed largely in the US in the period after World War II. “Post-war ‘cool' was in part an expression of war-weariness (厌战情绪), ... it went against the strict social rules of the time,” write sociologists Dick Pountain and David Robins in Cool Rules: Anatomy of an Attitude.

    But it was the American actor James Dean who became the symbol for “cool” in the hugely successful 1955 movie Rebel without a Cause. Dean plays a tough guy who disobeys his parents and the authorities. He always gets the girl, smokes cigarettes, wears a leather jacket and beats up bullies. In the movie, Dean showed what “cool” would mean to American young people for the next 60 years.

    Today the focus of “cool” has changed to athletics (体育运动) stars. Often in movies about schools, students gain popularity on the athletics field more than in the classroom. This can be seen quite clearly in movies like Varsity Blues and John Tucker Must Die.

    But many teenagers also think being smart is cool. Chess and other thinking games have been becoming more popular in schools.

    “Call it the Harry Potterization of America—a time when being smart is the new cool,” writes journalist Joe Sunnen.

    One of America's best-known artist colonies, the MacDowell Colony, will turn 110 next year. It is a place where artists of all types can sweep away distractions (令人分心的事物) and just create.

    MacDowell's operations are funded by foundations, corporations and individuals. Writers, composers, photographers, filmmakers and sculptors — both famous and unknown —compete for the 32 free studios at the place. Once accepted, an artist can stay for as little as a couple of weeks, or as long as a couple of months.

    When they arrive, artists find a kind of isolation (隔绝) hard to find in our world. There's no phone. No fax. No friends. No family. It's just a cabin in the snowy woods.

    Writer Emily Raboteau lives in New York City. She came to MacDowell to work on a novel. She received a desk, chairs, pencil and paper — and ice grippers. The walk from one isolated, one-room studio to another is icy, so colony residents (居住的人) fasten the ice grippers to the bottom of their shoes.

    Another colony resident, Belfast composer Elaine Agnew, plays a piece called “To a Wild Rose,” written by Edward MacDowell. She says it's so famous that every pianist in the world has played the tune. A hundred years ago, Macdowell owned the land where the colony now sits. He liked its isolation and his ability to get work done there. After his death, his wife, Marion, encouraged other artists to come.

    And for the last century, artists have accepted the invitation, coming to step outside of their daily lives for a short time. Privacy is respected, but cooperation and discussion is common.

    Screenwriter Kit Carson — who wrote Texas Chainsaw Massacre 2 and the film adaptation of Sam Shepherd's play Paris, Texas — has visited MacDowell twice. He says that the interdisciplinary (学科间的) discussion there is valuable.

    “You sit around at dinner, talking, and then somebody runs off and brings you back some stuff and shows it to you,” he says. “That, I didn't realize, was part of the magic here, because people are really open to showing their opinions here.”

    The Poetry Foundation, recently named American poet Jack Prelutsky as the nation's first children's poet laureate (桂冠诗人). The group created the award as a way to increase children's love of poetry.

    As children's poet laureate, Jack Prelutsky will give two public readings in the next two years. He will also advise the Poetry Foundation about children's literature and take part in projects concerning children and poetry.

    Jack Prelutsky has been writing poetry for children for over forty years. He has written more than thirty five books of poems. His first book was called A Gopher in the Garden. It was published in 1967. His latest is called Behold the Bold Umbrellaphant and Other Poems.

    Jack Prelutsky is well known for creating new words by combining two words to create a new kind of creature. For example, he combined "radish" with "shark" to get "radishark". "Lion" and "broccoli" became "broccolion". He also created "umbrellaphant"， a mixture of the words "umbrella" and "elephant".

    Jack Prelutsky says that children like his poems because he writes about things they care about. Poetry researchers say that Jack Prelutsky's poems recognize children's feelings. An example of this is the poem My Sister Is a Werewolf which is about how it feels to be different.

    Jack Prelutsky also writes poems about American holidays. His poem It's Halloween is a very famous one about the holiday celebrated at the end of October.

    Long before iPhone, the cigarette was the companion of choice for restlessness. And long before Facebook and WeChat, it was tobacco that promised to better your social life. Now, quitting smartphones has become the new quitting smoking.

    Of course, technology does not yellow your teeth, cause disease or lead to cancer. But some individuals are so concerned that device addiction is damaging their mental health. In order to reduce their dependence, even in Silicon Valley, people are turning off the messages that constantly buzz for their attention, banning smartphones from the bedroom and, curiously, changing the colors on their screens to a less tempting scale of gray.

    The big tech companies will have to work out how to respond to this new generation of quitters. Facebook is the first to go public with its attempt, hoping its recent move can make the social network more homely.

Last year the tech industry got a bad name —Big Tech—with unfortunate echoes of other industries that have faced fierce opposition, including Big Tobacco. Like them, the tech industry has to reduce concern from a new generation of activist shareholders （股东） that are questioning its role in the world. These campaigns are never as fierce as those faced by Big Tobacco. In the 1990s, socially responsible investors refused to put money in tobacco stocks.

    It is far difficult for investors to challenge Big Tech and hard to separate the good these companies do in the world-connecting old friends and giving space for people to share their ideas-from the bad. In the meantime, stopping using technology remains problematic. In The World Without Mind: The Existential Threat of Big Tech, Franklin Foer argues that tech should be seen in a similar way to junk food: a convenience that some reject for more continuing nutrition.

    So we need to do more to turn the tide. In the same way that public service announcements made smoking around your children taboo （禁忌）, we can warn parents against losing themselves in their smartphones while taking care of kids. We can also create no-smartphone zones at dinner. Eventually smartphones could be banned from all public places and help us give our attention to the people around us instead.

    Learning is so complex that there are many different psychological theories to explain how people learn. A psychologist named Albert Bandura suggested a social learning theory which shows that observation, imitation (模仿), and modeling play a primary role in this process.

    In Albert Bandura's opinion, people can learn through observation. Observational learning doesn't even necessarily require watching another person join in an activity. We can also learn by reading, hearing, or watching the actions of characters in books and films. However, just observing someone else's actions isn't always enough to lead to learning. Your own mental state also plays an important role in determining whether a behavior is learned or not. In addition, though in many cases, learning can be seen immediately when the new behavior is displayed, yet sometimes we can learn things even though that learning might not be immediately obvious, which means people can learn new information without showing new behaviors.

    Not all observed behaviors are effectively learned. Certain requirements need to be related to the observational learning process. For example, you need to be paying attention. Also your retention is an important part of observational learning as you need to pull up information later and act on it during the process. Once you've paid attention to the model and kept the information, it's time to actually perform the behavior you observed. Further practice of the learned behavior leads to improvement. Finally, you have to be motivated to imitate the behavior that has been modeled.

    Social learning theory have many real-world applications. For example, researchers employ it to look into and understand ways that positive role models can be used to encourage desirable behaviors. Besides, it's also applied in the field of education, and today, both teachers and parents recognize how important it is to model appropriate behaviors.

    Have you ever taken a test that you thought you could have passed easily, only to make some silly mistakes that really hurt your grade? More than a few students have done that. And some seem to do it over and over again.

    There are several problem areas that can cause students to goof up or do poorly in a test that they could have passed.

    Some students can become overconfident in their knowledge of the subject matter. They think they know the material better than they actually do. It is easy for students to misjudge their own knowledge, and when they realize that they don't know the material, it is too late.

    What happens more often, though, is that some students feel they are smart enough to be able to guess their way through a test. So they don't bother studying the material. They are overconfident in their ability to figure things out.

    In either case, overconfidence can result in lower grades in tests. Does this apply to you?

    Another thing that can happen is that students underestimate (低估) the difficulty of the test. They expect an easy test, but the teacher throws in a real tough test that they haven't prepared for. Sometimes the teacher may cover material in the test that students weren't expecting. That can happen, especially if you weren't paying attention in class.

    Finally, there are students who don't feel that getting a good grade is important to them, so they don't bother to study or even try to do well. Such students may be trying to punish their parents, have a poor image of themselves, or are just plain foolish. Hopefully, you are not one of these students.