Lisa: My best teacher is my geography teacher in 10th grade. Why? Because we did school projects! Back then I wrote about India and never forgot what I had learned. He brought the culture to life by letting me become part of it. He also listened to us and was always ready with a kind word.

David: My best teacher is my high school social studies and history teacher, Thomas Ladenburg. He respected us, though we were just teenagers. His class was never boring because he often asked us to discuss in class. He used his own materials which made the class very interesting.

Henry: My best ever teacher is my biology teacher in high school. I really liked her class. She explained everything very clearly. She also checked our notebooks to make sure we had written down what she said. Now, many years later, I can still remember a large part of the things she taught!

Susan: The best teacher I have ever had is my 10th grade social studies teacher. She was always in a good mood and kept us laughing. She was really young, so she acted like us teenagers, which made learning fun. If we needed to talk to an adult about a problem, we would always come to her because we knew she could help us.

Tom: My favourite teacher is Mr. Yelle. He taught us math, science and music. He spoke to us “at eye level”, and was very patient and kind. We did great projects for the science fairs. Forty years later, I still remember his lessons very well. By the way, though he was called Mr Yelle, he didn't yell(喊叫).

    No student of a foreign language needs to be told that grammar is complex. By changing the order of the words and by adding a range of auxiliary verbs (助动词) and suffixes (后缀), we can turn a statement into a question, state whether an action has taken place or is soon to take place, and perform many other word tricks to convey different meanings. However, the question which many language experts can't understand and explain is—who created grammar?

    Some recent languages evolved due to the Atlantic slave trade. Since the slaves didn't know each other's languages, they developed a make-shift language called a pidgin. Pidgins are strings of words copied from the language of the landowners. They have little in the way of grammar, and speakers need to use too many words to make their meaning understood. Interestingly, however, all it takes for a pidgin to become a complex language is for a group of children to be exposed to it at the time when they learn their mother tongue. Slave children didn't simply copy the strings of words used by their elders. They adapted their words to create an expressive language. In this way complex grammar systems which come from pidgins were invented.

    Further evidence can be seen in studying sign languages for the deaf. Sign languages are not simply a group of gestures; they use the same grammatical machinery that is found in spoken languages. The creation of one such language was documented quite recently in Nicaragua. Previously, although deaf children were taught speech and lip reading in the classrooms, in the playgrounds they began to invent their own sign system, using the gestures they used at home. It was basically a pidgin and there was no consistent grammar. However, a new system was born when children who joined the school later developed a quite different sign language. It was based on the signs of the older children, but it was shorter and easier to understand, and it had a large range of special use of grammar to clarify the meaning. What's more, they all used the signs in the same way. So the original pidgin was greatly improved.

    Most experts believe that many of the languages were pidgins at first. They were initially used in different groups of people without standardization and gradually evolved into a widely accepted system. The English past tense—“ed” ending— may have evolved from the verb “do”. “It ended” may once have been “It end-did”. It seems that children have grammatical machinery in their brains. Their minds can serve to create logical and complex structures, even when there is no grammar present for them to copy.

    Listed below are the stories of women you may not know about, but definitely should.

    Hedy Lamarr

    Hedy Lamarr starred in many films. But her film career is far from her only noteworthy achievement; she was also a brilliant inventor. In 1942, she and composer George Antheil received a patent（专利）for a device that could change radio signal frequencies. The purpose of the technology was to keep military enemies from figuring out messages. But it did more than that - it laid a foundation for the wireless technology we use today.

    Maria Sibylla Merian

    Today, children can happily explain how a caterpillar（毛虫） tums into a butterfly. But there was a time when no one knew this. Until the 1670s, scientists thought that caterpillars and butterflies were two totally different creatures. Thanks to Maria, we know the truth about these beautiful winged insects. Fascinated by insects, she began collecting, studying and drawing them as a child. It was through her study of caterpillars that she discovered the truth about their life cycles. She published two volumes of naturalist research, which provide major contributions to the field of entomology（昆虫学）.

    Ada Lovelace

    Ada Lovelace, the daughter of celebrated British poet Lord Byron, wasn't a poet herself but the world's first computer programmer. We think of computers as a recent invention, but people were toying with the idea of "computing machines" in the mid – 19th century when Lovelace was alive. Lovelace's mathematical genius was apparent at a young age and caught the attention of Cambridge professor Charles Babbage, who was working to design early computing machines that would be able to quickly solve math problems. Lovelace wrote some suggestions as to how to program the machines to work out numbers.

    In addition to designing this early computer program, she was also the first to surest that these computers might be able to do more than compute. She imagined them doing almost everything, from producing images to composing music.

    Years ago, the American writer Kurt Vonnegut often said there was one story that would always make a million dollars: Cinderella.

    Cinderella made more like $ 70 million in ticket sales when it opened last weekend. But the movie got a mixed reaction. David Rooney of The Hollywood Reporter praised the movie and said, “Anyone will find something to enjoy in it.” Steven Rea of The Philadelphia Inquirer called the movie “a winning re-do”. Richard Corliss of Time magazine wrote that “Disney finally got Cinderella right. ” Other people were not as happy with the movie. Sara Stewart of the New York Post wrote, “This Cinderella is all dressed up with nowhere very interesting to go.”

    Although different people think differently towards the movie, what is clear, however, is the movie's business success. It is not only popular in the theaters but also in sales. And Disney has widened its usual market for Cinderella products.

    There are products connected to the Disney movie targeted (面向) not only at little girls, but women, too. For example, the famous shoe designer Jimmy Choo worked with Disney to create Cinderella's shoes”. You can buy them for about $ 5,000. At that price, you would not want to lose one at the party, even if that is the way you get your prince (王子).

    The make-up (化妆品) company MAC quickly sold all its products connected to Cinderella. HSN is a popular website selling clothing and objects for the home. The marketer is now also selling Cinderella products.

    So, is there anything left for the children, those people we think of as the traditional audience (观众) for the age-old tale? Yes, you can find toys and other children's products at the American store JCPenney. Of course, you can also visit a Disney store.

    Few of us make money by losing sleep. But three graduate students at Brown University in Providence built a company around sleep deprivation(睡眠不足).

    Jason Donahue, Ben Rubin and Eric Shashoua were working late nights in Brown's business and engineering schools. They began thinking about ways to sleep better. They discovered they weren't alone in burning the midnight oil. Around 20% of Americans get less than six hours of rest a night.

    The friends imagined a smart alarm clock that could track how much time people spend in the most restorative(有恢复作用的) stages of the sleep cycle: REM (rapid eye movement) and deep sleep. What would it cost to design such a thing? Five years of research, 20 employees, $14 million and a whole lot of doubting from investors and scientists.

    Their company, Zeo, based in Newton, Mass, launched its product in June, 2009. The Zeo device uses a headband with tiny sensors(传感器) that scan your brain for signs of four sleep states-REM, light, deep and waking sleep. The smart alarm clock displays a graph of your sleep pattern and wakes you as you're not in REM sleep. In the morning you can upload the data to the company's Web site, and so track your sleep over time. Most of the feedback(反馈) comes in the form of Zeo's ZQ score showing how well you've slept.

    “Zeo allows people to unlock this black box of sleep,” says Dave Dickinson, a health-care CEO.

    Whether any of this actually improves sleep is up to the consumer, who will also need to make lifestyle changes like cutting out alcohol before bedtime or caffeine after 3 P.M.

    For now the company is selling Zeo online only. Dickinson also plans to spread it to countries such as Australia, where sleep deprivation approaches US levels.

    AA famous magazine, Amusement Today, does a survey among park lovers every year both in the US and overseas, based on which, "Top 5 List of the Best Amusement Parks in the World" has come out as follows:

    Disneyland, California

    Disneyland is a theme park in Anaheim, California, the US. More than 515 million guests have traveled to this American landmark from around the world since the park first opened to guests on July 17, 1955. The park consists of many world- famous sections, such as Main Street, Adventure land, New Orleans Square, and so on.

    Magic Kingdom, Disney World, Florida

    Magic Kingdom is a theme park within the Walt Disney World Resort in Lake Buena Vista, Florida, near Orlando opened on October 1, 1971. It is the most famous theme park in Florida. The park's design and attractions don't make much difference from Disneyland Park in Anaheim.

    EPCOT, Disney World, Florida

    EPCOT is the second theme park built at the Walt Disney World Resort near Orlando, Florida. The park opened on October 1, 1982, and was named EPCOT Center from1982 to 1993. It was the largest Disney theme park in the world until 1998, when Disney's Animal Kingdom opened.

    Disney-MGM Studios, Florida

    MGM's streets are the home for some great movie-themed attractions with a history of less than 30 years. With the addition of the Twilight Zone Tower of Terror and the Rock and Roller Coaster, the park is now home to Disney World's most thrilling rides.

    Universal Studios, Florida

    Go behind the scenes, beyond the screen and jump right into the action of your favorite movies at Universal Studios, the number one movie and TV theme park in the world.