My name is Carla. My school is big and beautiful. Here is a map of it. Where is the classroom building? It is next to the office building. Our teachers work in the office building. Behind the office building, there is a sports hall. The dining hall is on the left of the sports hall. It is also near a pay phone（付费电话）. The playground is between the library and the science building. I like the library very much. Oh, look at the students' dormitory（宿舍）building. It is in front of the science building!

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    Marco Polo was born in Italy in 1254. When he was 17, he travelled along the Silk Road with his father, who wanted to trade with the Chinese. Finally, they arrived in Beijing. They were guests at the Emperor's Palace Marco was very clever and could speak four languages. The Emperor was impressed by him and they became friends. He asked Marco to serve in his court (宫殿) and sent him to do many important jobs all over the country.

    Marco was amazed by how beautiful China was. He was impressed by Beijing and the Emperor's Palace, especial the Summer Palace which was described as "The greatest palace that I've ever seen". The walls were covered with gold and silver and the hall was so big that it could easily hold 6,000 people for dinner.

    Marco was also attracted (吸引) by the inventions and developments in China which couldn't be found in Europe at that time. Marco was surprised to see Chinese people using paper money in the markets. In Europe, people paid for goods(货物) with gold and silver. He could not understand how people paid for food and valuable things with paper! He was also puzzled by the black stones people used to burn to produce heat. The black stones were coal, but Marco had never seen coal before!

    After he served the Emperor for 17 years. In 1291, Marco returned to Italy. He was a very wealthy man then. A writer wrote down all the stories that Marco told him in a book called The Description of the World, which became one of the best-selling books in Europe.

    People enjoyed the book, but many of them thought that Marcos stories about China were too fantastic to be true. However, Marco always stood by his tales. Just before he died, aged 70, Marco was asked the question, "Was it all true?" And this was his answer, "I have only told a half what I saw!"

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{#blank#}1{#/blank#}When a teacher assigns a lot of homework, Domenica Roman draws up a timetable, dividing the assignment into small parts." It's like eating a steak(牛排)," she says. "You chew it one bite at a time."

{#blank#}2{#/blank#}One student put a vocabulary list in the bathroom. He learned a new word every day while brushing his teeth. Another student used the time to remember biology terms while practicing running.

{#blank#}3{#/blank#}In high school, McCray ran track, played football and was in the band and orchestra. "I was so busy that I couldn't waste time looking for a pencil or missing paper. I kept everything right where I could put my hands on it," he says.

{#blank#}4{#/blank#}In an international class, Asian-Americans, on average, scored higher than other students. The teacher found that the Asian-Americans discussed homework problems together, tried different ways to work out the problems and explained their solutions to one another.

{#blank#}5{#/blank#}Christi is an excellent student at the University of California. If her math teacher assigns five problems, she does ten. If the history teacher assigns eight pages of reading, she reads twelve. "Part of learning is practicing," she says. "And the more you practice, the more you learn."

    There are some very good things about open education. This way of teaching allows the students to develop their own interests in many subjects. Open education allows students to be responsible(负责) for their own education. Some students do badly in traditional classrooms. The open classroom may allow them to enjoy learning. Some students will be happier in an open education school. They will not have to worry about grades or rules. But many students will not do well in an open classroom.

    For some students, there are too few rules. These students will do little in school. They will not make good use of open education. Because open education is so different from traditional education, these students may have a problem of getting used to making so many choices. For many students it is important to have some rules in the classroom. They worry about the rules even when there are no rules. Even a few rules will help this kind of students. The last point about open education is that some traditional teachers do not like it. Many teachers do not believe in open education. Teachers who want to have an open classroom may have many problems at their school.

    You now know what open education is. Some of its good points and bad points have been explained. You may have your own opinion about open education. The writer thinks that open education is a good idea, but only in theory(理论). The writer believes that most students, but of course not all students, want some structure in their classes. They want and need to have some rules. In some cases, they must be made to study some subjects. Most of the students are pleased to find subjects they have to study interesting. They would not study those subjects if they did not have to.

Open Education

    Many people believe that not only wetness, but also light and dirty things are the greatest enemies of stamps. People protect their stamps in several different ways.

    In fact, we should never touch the stamps with our hands. This avoids moving dirty things onto them. Stamp tweezers (镊子) should be used in all conditions.

    Stamps are printed things. The colour will slowly disappear if they are put in the light for a long time. So we should not put stamps in the light for long. Direct sunlight must be avoided as well.

    Wetness is an important problem for stamps. Some collectors will put stamps in separate plastic bags. However, it is possible that some stamps have taken in some water from the air before they are put into the plastic bags. Stamps become yellow easily and rapidly after they take in wet air. To protect the stamps, some people also put the stamps into a special room which has a machine to keep the air cool and dry. However, not many people can afford that.

    To keep stamps, stamp collectors usually put them under plastic covers. It is a common and simple way. This helps because the plastic cover keeps the stamps off the wet air. It also stops the fingers from touching the stamps.

    Some collectors prefer to store stamps inside a plastic box with desiccants (干燥剂). However, we should take care not to let the stamps touch the desiccants. On top of that, don't take your stamps out on a wet day.