A study published in Child Development,the top－ranked educational psychology journal,provides some of the strongest evidence yet that gesturing may have a unique effect on learning.Teachers in the United States tend to use gestures less than teachers in other countries.

     "Gesturing can be a very beneficial tool that is completely free and easily employed in classrooms," said Kimberly Fenn,study co－author and assistant professor of psychology at Michigan State University."And I think it can have long－lasting effects."

    Fenn and Ryan Duffy of MSU and Susan Cook of the University of Iowa conducted an experiment with 184 second－,third－ and fourth－graders in Michigan elementary classrooms.

    Half of the students were shown videos of an instructor teaching math problems using only speech.The others were shown videos of the instructor teaching the same problems using both speech and gestures.In the speech－only videos,the instructor simply explains the problem.In the other videos,the instructor uses two hand gestures while speaking,using different hands to refer to the two sides of the equation.Students who learned from the gesture videos performed better on a test given immediately afterward than those who learned from the speech－only video.

    Another test was given 24 hours later,and the gesture students actually showed improvement in their performance while the speech－only students did not.

    While previous research has shown the benefits of gestures in a one－on－one tutoring－style environment,the new study is the first to test the role of gestures in equivalence learning in a regular classroom.

    The study also is the first to show that gestures can help students transfer learning to new contexts—such as transferring the knowledge learned in an addition－based equation to a multiplication－based equation.

    Fenn noted that U.S.students lag behind those in many other Western countries in math and have a particularly hard time mastering equivalence problems in early grades."So if we can help them grasp this foundational knowledge earlier," she said,"it will help them as they learn algebra and higher levels of mathematics."

    When I was a child, I often dreamed of the time when I could leave home and escape to the city. We lived on a farm, in the winter especially, we wear quite out off from the outside world. As soon as I left school, I packed my bags and moved to the capital.

    However, I soon discovered that one big disadvantage is money. It costs so much to go out, not to mention basics like food and housing. Another disadvantage is pollution. I suffer from asthma(哮喘), and the air is so bad that I am afraid to go outside. Then there is the problem of traveling round. Although I have a car, I seldom use it because of the traffic jams. One choice is to go by bicycle, but that can be quite dangerous.

    Of course there are advantages. First, there is so much to do in the city, whatever you tastes in culture or entertainment(娱乐活动). Besides, there are wonderful jobs and greater chances of moving to a more important job or position. Finally, if you like shopping, the variety of goods is very surprising — and, what is more, shops are often only a short walk away.

    Is life better then, in the city? Perhaps it is, when you are in your teens(十几岁) or twenties. However, as you get older, and especially if you have small children, the peace of the countryside may seem preferable. I certainly hope to move back there soon.

    Will it matter if you don't take your breakfast? Recently a test was given in the United States. Those testes included people of different ages, from 12 to 83. During the experiment, these people were given all kinds of breakfast, and sometimes they got no breakfast at all. Special tests were set up to see how well their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person eats a proper breakfast, he or she will work with better effort than if he or she has no breakfast. This fact appears to be especially true if a person works with his brains. If a student eats fruit, eggs, bread and milk before going to school, he will learn more quickly and listen with more attention in class. Contrary to what many people believe, people become so hungry at noon that they eat too much for lunch, and end up gaining weight instead of losing. You will probably lose more weight if you reduce other meals.

    For thousands of years, people thought of glass as something beautiful to look at. Only in large glass windows. Glass bottles and jars that hold food and drink allow us to see the contents. Glass is used to make eyeglasses, microscopes, telescopes, and many other extremely useful and necessary things.

    Until the Second World War, most of the glass used for optical (光学的) instruments was imported from Europe. However, during the war Americans could not get European glass, and they were forced to make their own. Therefore, new kinds of glass were developed that had been previously unknown. These new effects were achieved by mixing other chemical elements with the sand. Some of the new glass is very strong and can resist many kinds of shocks. Legend (传说) has it that a kind of very hard glass was invented by a Roman who showed his discovery to the Emperor. When the Emperor saw the glass he feared that it would become more valuable than gold and sliver, making his treasure worthless. Therefore, he had the glass-maker killed, and the secret was not discovered again for hundreds of years.

    In the present century, safety glass was invented for use in modem cars and planes. Safety glass is made by placing a layer of plastic between two layers of plate glass. When the outside layer of glass is broken, the pieces do not scatter (散开) and injure people. Some glass of the type is strong enough to resist bullets (子弹).

    Although nowadays plastics have replaced glass under conditions where glass might be easily broken, there are new uses being developed, for the greatest advantage of glass is that its component (组成的) parts are inexpensive and can be found all over the world.

The Climb to the Top

    My life as a kid was a sweet life. I lived in a beautiful house with the beautiful surroundings in Puerto Rico. There was one particular thing I loved and it was a huge tree that was in my backyard. As a child, I used to climb the tree every day. Every time I went, I climbed higher and higher, reaching new branches, obstacles, and pathways on my way up. One day, I reached the top and I could see my island. I felt I was on top of the world, and nothing could stop me. Then, there was the day that seemed like the end of my life. This specific day changed my life forever.

It was a nice summer day. After breakfast, my family headed to the park to see my baseball game. In the evening we went to a carnival (嘉年华) in my town. My grandma was selling blankets under a tent. Suddenly, the mood of the day changed when my parents took me to my grandma's tent. Still to this day, I remember the exact words my dad said to me, "Son, how would you like to move to the United States?" I couldn't believe what he said. I then ran away from him as the tears rolled down my cheeks. My perfect life was being taken away from me.

    Two weeks later, we arrived at New York in late July, and my aunt and uncle drove us to Springfield，Massachusetts where we lived for seven years. Once we got there, I met my mom's family for the first time. September came and school started. I was afraid to go to a new school and make new friends. Most kids ignored me and some tried to talk to me, but I couldn't understand them or say anything. My first year in the United States was not fun or easy but I worked hard and got through it.

    Now that I'm grown, I look back on the journey that I've been through: living in a new place with no friends, new language, and new schools. Despite all those problems, I still remembered that special tree. That tree taught me to never give up and reach higher. I have beaten every difficulty that I have met in life and I just kept moving forward. My perfect life was never taken away from me; it has just started.

    Notre-Dame de Paris, a cathedral church in Paris, is the most famous of the Gothic cathedrals of the Middle Ages. For the French, it represents something immortal, ever- present and unchanging, like a mountain. Built over almost two centuries, the Notre-Dame is, as President Emmanuel Macron said, "where the French lived all their great moments". Soldiers prayed here before leaving for the Crusades; Napoleon Bonaparte was crowned here; it survived the French Revolution, two World Wars and the Nazi occupation. It is where men bend their knees to profess love and thousands of tourists take photos every day.

    A fire, whose cause was not identified yet, engulfed(吞没), on April 15th, the cathedral's upper structure. More than 400 firefighters took part in the 15-hour battle to control the blaze(火苗) that triggered sorrow over the globe. The extent of the damage is still unknown, but the fire destroyed much of the gothic cathedral's wood-timbered roof and spire(塔尖). The cathedral will certainly be restored (the French government promises), but the sight of flames bringing down the spire moved the world in a manner far exceeding its religious significance.

    French Culture Minister Franck Riester on Thursday said the government would draw all the consequences from the huge flames that destroyed the centuries-old Notre Dame Cathedral, adding measures to protect the national heritage were on the table. "Staff from the fire department, the culture ministry and the city town hall rushed to the Cathedral, when the fire started, to protect the main artworks that were inside. The artworks, which include relics such as the Christ's crown of thorns and French king Saint-Louis's 13th century tunic, were first moved to the city town hall and will now be transferred to the nearby Louvre Museum ." the minister told Le Parisian newspaper in an interview without giving details on the possible measures.