If you see a group of people dancing and singing on the street or in the railway station,  you don't need to feel surprised．They are a flash mob （快闪族）, which is a group of people who come together suddenly in a public place, do something unusual for a brief period of time,  and then quickly break up．They are usually organized with the help of the Internet or other digital communication network．At a predetermined time, they gather and perform some  distractions（消遣） such as waving their hands and exchanging books, Then, they quickly break up before the police can arrive．Using mobile phones, the flash mob can change its location if the first one has been replaced for any reason．

    Bill Lasik, senior editor of Harper's Magazine, organized the first flash mob in Manhattan in May 2003 and the first successful flash mob came together on June 3, 2003 - after the first try was foiled at Macy's department store．Lasik claimed that the activity was designed to make fun of hipsters （起时髦的人）, and call attention to the cultural atmosphere．

    Flash mob gatherings can sometimes shock people．Such an activity might seem amusing and untrue, but it also might frighten people who are not aware of what is taking place．Undoubtedly, flash mobs can serve as good political tools in any direction．They also have great economic potential, such as using flash mobs to advertise a product．

    The flash mob is now becoming more and more popular．People use it to do many things．For example, in 2009, Michael Jackson's fans took part in a flash mob to remember him．Hundreds of his fans gathered singing and dancing Michael's famous song "Beat It" together．Flash mobs give people from all walks of life an opportunity to come together to create a memory．

    It is necessary but difficult for English beginners to memorize new words, and long lists of words seem to make the mission impossible. They are puzzled why they try to memorize words with great efforts but forget them easily. That's why there are often inquiries about how to memorize new words.

{#blank#}1{#/blank#} Here are some tips to help.

    {#blank#}2{#/blank#} We too often separate the process of new words memorization from pronunciation. In fact these two can be combined and each will enhance the other. Saying the word to ourselves helps activate aural(hearing) memory, which helps the memory. {#blank#}3{#/blank#} The more familiar we are with the word,

the greater chance we will have to keep it for the rest of our life.

    Never memorize single English words. {#blank#}4{#/blank#} Relate the word to terms we already know, either as synonym or antonym. For example, the word "gargantuan" is similar in meaning to words "gigantic", ”huge" and "large". Make a sequence of words: "small, medium, large, gigantic, and gargantuan".

    Create a mental image of the word that involves strong emotions. Think, "The gargantuan whale is going to swallow me whole".

    Learning English words requires action. Complaining how difficult it is to memorize new words will be of little help. {#blank#}5{#/blank#} Have a try with ten words a day and you will see what a difference you will make in our English learning.

A. So take action right now.

B. Speak the word while memorizing it.

C. Memorizing new words is very important.

D. Actually, some have given up learning new words.

E. In fact, learning new words needn't be that difficult.

F. Make as many associations and connections as possible.

G. The sound of word helps us recall the spelling and familiarizes us with the word.

    Tennis lessons

    This event takes place every Wednesday from May 9 to July 17. These lessons are open to all from complete beginners to seasonedpros (熟练的行家). Playing tennis is a great way of getting fit. Contact The Bridge to find the time for your age group.

    Cost: £4.80 adults, £3.30 under 16 per class

    Contact: Laura Reynolds

    Tel: 020 8778 7158

    Street dance classes

    This event takes place every Wednesday from February 27 to December 25. The classes are set up for 3 to 6-year-olds. They provide an environment where each child can become confident in his or her efforts and successes. Our school believes “If You Aim High You Will Succeed”.

    Cost: £4 per student

    Contact: Hayley Rea

    Email: info@aimhighacademy.co.uk

    Children's workshops in clay(陶土)

    This event takes place every Monday, Tuesday, Wednesday and Friday from April 15 to July 1. The workshops are suitable for children aged five years and above. The children will be shown different methods of making many things in clay.

    Cost: £75 for 10 lessons

    Contact: Shirley Stewart

    Email: shirli_stewart@yahoo.com

    Caterpillar(毛毛虫) music

    This event takes place every Tuesday and Friday from October 18 to December 31. The classes are set up for 0 to 4-year-olds. We use puppets (木偶), actions, songs, instruments and games to entertain and introduce a love of music to your little one. The classes last 40 minutes and each week we have a different theme.

    Cost: £6 per class

    Contact: Angela Capriati

    Tel: 020 8698 8439

    Earthquake rescue robots have experienced their final tests in Beijing. Their designers say that with these robots, rescue workers will be able to have more time to save more lives during an earthquake.

    This robot looking like a helicopter（直升机）, is called the detector-bot . It's about 4 meters long, and it took about 4 years to develop the model. Its main functions（作用）are to collect information from the air, and send goods of up to 30kilos, to people stuck in an earthquake.

    This robot has a high quality 360 degree panoramic camera. It can work day and night and will also be able to send the latest pictures from the quake area. Dr. Qi Juntong, Chinese Academy of Science, said, "Unlike other automatic machines, the most important feature of this robot is that it doesn't need a distant control. We just set the information of the earthquake-struck area on it, and then it takes off, and lands by itself. It flies as high as 3,000 meters, and as fast as 100 kilometers per hour. "

This robot has a different function — it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers are unable to go.

    As well as a detector（探测器）that finds victims（遇难者）and detects poisonous gas, a camera is placed in the 40 centimeter long robot, which can work in the dark.

    Another use for the rescuers is the supply bot, with its 10-meter-long pipe. People who are caught in the ruins will be able to get supplies including oxygen and liquids.

    Experts have said that the robots will enter production, and serve as part of the national earth- quake rescue team as soon as next year.

    The Boy Made It!

    One Sunday, Nicholas, a teenager, went skiing at Sugarloaf Mountain in Maine. In the early afternoon, when he was planning to go home, a fierce snowstorm swept into the area. Unable to see far, he accidentally turned off the path. Before he knew it, Nicholas was lost, all alone! He didn't have food, water, a phone, or other supplies. He was getting colder by the minute.

    Nicholas had no idea where he was. He tried not to panic. He thought about all the survival shows he had watched on TV. It was time to put the tips he had learned to use.

    He decided to stop skiing. There was a better chance of someone finding him if he stayed out. The first thing he did was to find shelter from the freezing wind and snow. If he didn't, his body temperature would get very low, which could quickly kill him.

    Using his skis, Nicholas built a snow cave. He gathered a huge mass of snow and dug out a hole in the middle. Then he piled branches on top of himself, like a blanket, to stay as warm as he could. By that evening, Nicholas was really hungry. He ate snow and drank water from a nearby stream so that his body wouldn't lose too much water. Not knowing how much longer he could last, Nicholas did the only thing he could—he huddled(蜷缩) in his cave and slept.

    The next day, Nicholas went out to look for help, but he couldn't find anyone. He followed his tracks and returned to the snow cave, because without shelter, he could die that night. On Tuesday, Nicholas went out to find help. He had walked for about a mile when a volunteer searcher found him. After two days stuck in the snow, Nicholas was saved.

    Nicholas might not have survived this snowstorm had it not been for TV. He had often watched Grylls' survival show. Man vs. Wild. That's where he learned the tips that saved his life. In each episode(一期节目)of Man vs. Wild, Grylls is abandoned in a wild area and has to find his way out.

    When Grylls heard about Nicholas' amazing deeds, he was super impressed that Nicholas had made it since he knew better than anyone how hard Nicholas had to work to stay alive.

    Smart Kids is a collection of one hundred events scheduled in October. This year, it is experimenting with Pay What You Decide (PWYD). That is, you can decide to pay what you want to or can afford, after you have attended an event. You can pre-book events without paying for a ticket in advance. Here are some of the director's picks.

    Walk on the Wild Side

    Not ticketed, Free

Join storyteller Sarah Law to hear science stories about animals. Along the way you'll meet all sorts of beautiful creatures and discover life cycles and food chains. Best suited to children aged 5-9. Children under 8 must be accompanied by an adult.

    Introduction to Waves

    Pre-book, PWYD

    Subjects range from sound waves to gravity waves, and from waves of light to crashing waves on the ocean. Mike Goldsmith explores the fundamental features shared by all waves in the natural world.

Science in the Field

    Not ticketed, Free

This storytelling night features a scientist sharing his favourite memories of gathering first-hand data on various field trips. Come along for inspiring and informative stories straight from the scientist's mouth. Join Mark Samuels to find out more in this fun-filled workshop.

    Festival Dinner

Pre-book, £25 per person

Whether you want to explore more about food, or just fancy a talk over a meal, join us to mark the first science festival in London. Which foods should you eat to trick your brain into thinking that you are full? Find out more from Tom Crawford.