You may have heard adults say they are uncomfortable in the morning without a cup of coffee. One reason they may feel that way is that coffee contains caffeine(咖啡因). Caffeine appears naturally in coffee, tea, and cocoa beans, which are used to make chocolate. But now food makers are adding it to many products, from potato chips to water.

    The US government is especially worried about the problem. That's why the Food and Drug Administration (FDA) is studying the health effects of caffeine on young people. Studies show that too much caffeine can make people nervous and unable to sleep. What's more, caffeine is habit-forming. Those who consume it regularly and stop suddenly may experience headaches and feel tired.

    One of the biggest concerns is the large amount of caffeine added to so-called energy drinks, like Red Bull. A 12-ounce can of cola has about 35 milligrams of caffeine. A similar serving of Red Bull contains more than three times that amount.

    The Institute of Medicine is also working on caffeine-safety measures. “Teenagers should not drink beverages that contain caffeine. They should be aware of caffeine's effects on health and on how the brain works. Take, for example, teenagers who consume caffeine to stay awake and study for a test. They will remember less of what they just studied,” said Stallings, a member of the institute.

    Companies that make products with added caffeine claim they do not advertise them to kids. However, there is no law to stop children from buying them. So the FDA needs to set limits on caffeine, especially in energy drinks. As for added caffeine in foods, the government should just say no. If not, the amount of caffeine should be printed on food labels to remind consumers. The government must do that.

    Doctors say kids should avoid caffeine. If you need extra energy, try these natural boosters: eat right, exercise, and get plenty of sleep.

Live in Cave

    Kokopelli's Cave Bed &Breakfast, Farmington, New Mexico.

    The idea may seem very stone age, but this lone unit, which was carved into a 65-million-year-old sandstone rock, is filled with modern amenities(便利设施). The Travel Channel says these “cave comforts” include a comfortable bedroom, large fire circle, and rainfall shower. Plus, the views of the La Plata River and nearby mountains are breathtaking.

    $260/ night; bbonline.com

    Sleep below the Surface

    Jules' Undersea Lodge, Key Largo, Florida.

    This hotel, which is named after20,000 Leagues Under the Sea author Jules Verne, is the world's only underwater hotel. Lonely Planet says that this former research station has been turned into a pleasant hotel. Guests must make the 21-foot dive to its two rooms, fully stocked kitchen, and showers. Don't want to cook? The staff will dive and bring your food to you.

    $400/night; jul.com

    Sail into History

    The Queen Mary, Long Beach, California

    Wish you could experience the greatness of a ship like the Titanic? According to CNN Travel, here's your chance. Book a room to get a taste of a bygone time on this ship-turned hotel. You may not be able to sail into the sunset like Kate and Leo, but you can enjoy onboard attractions like original 1930s artwork and tours of strange and mysterious hot spots.

    $129/night;queenmary.com

    It is irrefutable: Parents, who talk to, read and engage with their very young children as often as possible, help them build literacy (读写能力) skills at an early age.

    Also certain: Parents of very young children usually have to do a lot of laundry. And low-income families tend to bring their kids with them to public laundromats (洗衣房).

    Those truths appear once a week at select neighborhood laundromats in Chicago. That's when librarians lay down colorful mats and oversized board books beside the industrial washing machines.

    Inside one of about 14 laundromats in the city's low-income neighborhoods, the librarians gather all available children for Laundromats Story Time (LST), a Chicago Public Library (CPL) program.

    With the noise of the washers and dryers, anywhere between a handful to more than a dozen children hear stories, sing songs and play games designed to help their brains develop. The event also aims to instruct parents on how to repeat the experience for their kids, working to raise poor literacy rates in underserved communities.

    "We read books, we sing songs, we do plays," says Becca Ruidl, the CPL's STEAM Team early learning manager, who runs the LST program. "We kind of keep it going so parents can walk in adn join in at any time. But a big part of what we do is model literacy skills for parents so they can do it at home with their kids."

    While a laundromat seems an unlikely place to engage with children, "we really wanted to meet people in the community where they're. "Ruidl says.

    And it clearly meets a need: Library officials say the program is in increasing demand, while Ruidl says families have adjusted their household's laundry day to suit the librarians' laundromat visits. At the same time, LST's co-sponsors—including a laundry industry trade group and Libraries Without Borders, an organization fighting poverty through literacy—have worked with the CPL to draft an instruction handbook to help expand the concept to other U.S. cities.

    When Iwas.in the third grade, we had a hunt at school. We gathered up chalk，pencils，stones, and so on, rapidly filling our checklists. It was a very close race. I was out of breath when I reached the clover (三叶草)patch in search of the last, most hard-to-find item: a four-leaf clover.

    I was pretty sure that I was going to win. 1 have always been able to find four-leaf clovers. I just see them.

    I spent my childhood collecting and pressing four-leaf clovers into books at my mother's house. I started with big cloth- and leather-bound books. When I ran out of romantically bound volumes, I began to put my treasures into anything I could find: fiction paperbacks, cookbooks. The same is true in my house today. Shake a book, and a papery treasure just might fall into your hand.

    A few years ago, in Nova Scotia, my husband and I pulled off the road for a picnic. The ground was thick with clover. Some shoots had four, five, even six leaves. I lined them up on the picnic table to admire as my husband, never yet having found one four-leaf clover, looked on with awe. To me, it was simple. The differences in their shapes popped out, breaking the pretty pattern of the conventional clovers with their three perfect leaves.

    Two summers back, while waiting for an airport shuttle in Munich, I found a tiny four-leaf clover in a traffic circle and put it into my passport. On the way home, my husband and I were upgraded to business class. Friends attributed our good luck to the clover. I think, it's more likely that we were upgraded because a kind customer service officer took pity on us.

    People disagree about whether the luck lies in the finding or in the possession of a clover. Some believe that the luck is lost if the four-leaf clover is even shown to somebody else, while others think the luck doubles if it is given away. I believe that positivity is increased by sharing. I feel lucky to find the clovers so often, but I don't think they influence my life any more than it does to share anything a little special—that momentary closeness between you and a friend or a stranger, as you all lean in to wonder at a rare find.

    Blogs(博客) have become an important part of life. Millions of people have blogs. Perhaps you would like to have one; you would like to improve your blog; perhaps you would like to make your blog as a means of earning money or attracting more people. Whatever your aim is, this course shows you how to become better bloggers. You will learn how to find the right tone for your blog, set it up and keep it, write something that are effective and worth reading, and attract people from all over the world to your blog. While it's simple to start a blog, it takes energy and skill to do it really well, as is true of any kind of writing.

    Among the topics covered: introduction to the blog, the benefits of blogging, focusing on your blog concept, how to set up and keep a page, tips for effective blog writing and drawing visitors to your blog.

    Course offered

    How to blog

    In this four-week course, a blogging expert will guide you through the process of designing, setting up, writing, and improving a blog. Each student will talk with the expert on blog, then set up a "live" blog and introduce it to the rest of the class for suggestions. Students will also have chances to ask the expert questions.

    Online classes

Tuition(学费): $ 125.      Registration(注册): $ 25.

Each class is strictly limited to 25 students aged 18 and up.