Traditionally, across the world, boys and girls attend a mixed school, where they study together. But boys' schools are the perfect place to teach young men to express their emotions (情感) and encourage them to take part in activities such as art, dance and music.

    Boys at single-sex schools were said to be more likely to take part in cultural and artistic activities that helped develop their emotional expressiveness, rather than feeling they had to correspond to(和…相符) the "boy code" of hiding their emotions to be a "real man".

    The findings of the study go against accepted wisdom that boys do better when taught together with girls.

    Tony Little, head master of Eton, warned that boys were being failed by the British education system because it had become too focused on girls. He criticized teachers for failing to recognize that boys are actually more emotional than girls.

    The research argued that boys often perform badly in mixed schools because they become discouraged when girls do better earlier in speaking and reading skills.

    But in single-sex schools teachers can tailor (量身定做) lessons to boys' learning style, letting them move around the classroom and getting them to compete in teams to prevent boredom, wrote the study's author, Abigail James, of the University of Virginia.

    Teachers could encourage boys to enjoy reading and writing with "boy-focused" approaches such as themes and characters that appeal to them. Because boys generally have more acute vision, learn best through touch, and are physically more active, they need to be given "hands-on" lessons where they are allowed to walk around. "Boys in mixed schools view classical music as feminine（女性的） and prefer the modern genre （类型） in which violence and sexism are major themes," James wrote.

    Single-sex education also made it less likely that boys would feel that they had to be "masterful and in charge" in relationships. "In mixed schools, boys feel forced to act like men before they understand themselves well enough to know what that means," the study reported.

The Grand Canyon(大峡谷)Helicopter Tour

    You'll discover the natural beauty of the Grand Canyon as your helicopter flies to the west edge，passing over Lake Las Vegas，Lake Mead and the Hoover Dam．During the flight，you can listen to a recorded introduction to the Grand Canyon and its surroundings via headphones．At noon，you'll land for an unforgettable champagne picnic，3，200 feet below the edge．While you share a bottle of champagne，your pilot and guide will be happy to answer any questions you may have．Your flight ends with a low-level pass over the famous Las Vegas Strip．On landing，a comfortable car is waiting to bring you back to your hotel．

    Each helicopter carries a maximum of 6 people including your pilot．For a roomier experience，upgrade your flight to an EC-130 helicopter which provides larger leg room and can accommodate more weight per seat．See Additional Info for details on weight restrictions．

Pricing Information

    Services included：45-minute(approx)flight each way，hotel pickup and drop-off by   limousine，lunch．

    Our price is constantly updated．Click to check pricing & availability on your preferred  travel date．

    Additional Information

    The maximum weight per passenger to ride in an A-Star helicopter is 2751bs．If passengers weigh in between 2751bs and 3001bs，you will be required to upgrade to the    EC-130．

    Pickup is available from selected Las Vegas hotels．You must contact the local travel    agency to fix your pickup time．

    All flight times are approximate and might be influenced by weather conditions．

    Traveler Review

    This is an absolute must do．The view of the Grand Canyon at his height was absolutely amazing! Our pilot was funny，knowledgeable and a great guide．All the staff from booking to check-in and helicopter departure were fantastic．I would recommend this tour to everyone．

    Elizabeth Blackwell was born in England in 1821, and moved to New York City when she was ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission(录取) to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling.

    In 1849, after graduation from medical school, she decided to further her education in Paris. She wanted to be a surgeon(外科医师), but a serious eye problem forced her to give up the idea.

    Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children Besides being the first woman physician and founding her own hospital, she also set up the first medical school for women.

    For several months, Cara has been working up the courage to approach her mom about what she saw on Instagram. Not long ago, the 11-year-old girl, like all the other kids in this story, discovered that her mom had been posting her photos for much of her life." I've wanted to bring it up. It's strange to see myself up there，and sometimes there are pictures I don't like of myself," she said.

    Like most other modem kids, Cara grew up immersed in social media. While many kids may not yet have accounts themselves, their parents, schools, sports teams, and organizations have been organizing an online presence for them since birth. The shock of realizing that details about your life have been shared online without your permission or knowledge has become an important experience in the lives of many teenagers. Recently a parenting blogger (博主)wrote in a Washington Post essay that despite (不顾)her 14-year-old daughter's horror at discovering that her mother had shared years of highly personal stories and information about her online, she simply could not stop posting on her blog and social media. The writer said that promising her daughter that she would stop posting about her publicly on the Internet would mean shutting down a vital part of myself, which isn't necessarily good for me or her." average parents do the same. There's even a special word for it: sharenting. Almost a quarter of children begin their digital lives when parents upload their photos to the Internet, according to a study conducted by the Internet-security firm AVG. The study also found that 92 percent of kids under the age of 2 already have their own unique digital identity.

    During the period from 1660 through 1800, Great Britain became the world's leader. Language itself became submitted to rules during this period. This need to fix the English language is best illustrated (描述) in the making of The Dictionary of the English Language by Samuel Johnson. Guides to the English language had been in existence before Johnson began his project in 1746. These, however, were often little more than lists of hard words. When definitions of common words were supplied, they were often unhelpful. For example, a "horse" was defined in an early dictionary as "a beast well known".

    Johnson changed all that, but the task was not an easy one. Renting a house at 17 Gough Square, Johnson began working in the worst of conditions. Supported only by his publisher, Johnson worked on the Dictionary with five assistants. Compared to the French Academy's dictionary, which took forty workers fifty-five years to complete (1639-1694), Johnson's dictionary was completed by very few people very quickly.

Balanced on a chair with only three legs, Johnson sat against a wall in a room filled with books. Johnson would read widely from these books, mark passages illustrating the use of a particular word, and give the books to his assistants so that they could copy the passages on slips of paper. These slips were then stuck to eighty large notebooks under the key words that Johnson had selected. Fixing the word by this method, Johnson could record a word，s usage and its definition.

    How many passages were used? According to Johnson's modern biographer Walter Jackson Bate, the original total number could have been over 240,000. How many words were defined by the lexicographer? Over 40,000 words appeared in two large books in April of 1755. Did Johnson fully understand the huge task he was undertaking when he began? As he told his contemporary biographer James Boswell, "I knew very well what I was undertaking and very well how to do it — and have done it very well."

    Earlier this month a study showed that bees can teach themselves to play football. They can learn by watching and, rather than copy what they have seen, change it to make it better. Bees also have a clever trick for helping their friends find lunch. New research shows that bees leave smelly little footprints on flowers that help them know what flowers they and their family members have recently visited.

    The discovery was made by scientists from University of Bristol who report these smelly footprints help bees distinguish  between their own scent(气味), the scent of a relative and the scent of a stranger. And by using this ability, bees can improve their success at finding good sources of a food and avoid flowers that have already been visited and mined of nutrients.

    The Bristol team performed three separate experiments with bumblebees(大黄蜂)in which they were repeatedly exposed to rewarding and unrewarding flowers at the same time that had footprints from different bees attached to them. Each flower type either carried scent -marks from bumblebees of differing relatedness or were unmarked. The marks were either the bee's own marks, sisters from their nest, or strangers from another nest.

    The study shows that not only can bumblebees tell the marks of their own nest mates from strangers, but they can also discriminate between the smell of their own footprints and those of their nest mate sisters, which could help them to remember which flowers they have visited recently. But it doesn't explain how they use that in the wild. They may detect the footprints of their friends and keep moving on, since that flower may be tapped out. Or they may smell a bit of familiar foot smell and dive in, seeing it as a marker that nectar(花蜜)is present.