雅思考试大作文范文四篇 科技类
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雅思大作文范文：电脑VS老师
It is witnessed that computer technology hasbrought human beings uncountable benefits and aneducational revolution seemingly can be expected hence a substitution of teachers in theclassroom. As to discuss this controversial issue, opinions vary from person to person.
On the one hand, the teacher plays an important role as a supervisor as well as aconductor in the classroom (topic sentence).It is commonly believed that adolescents are tooyoung to distinguish the good from the bad and they need correct guidance from decentadults; otherwise, they might stray from the right way. Children are always easy to becomeaddicted to computer games, which have too much violent and pornographic propaganda.Without teachers' guidance, most children would spend hours playing fascinating games oncomputers instead of studying useful knowledge during school times. Moreover, a teacher in theclassroom may organize a discussion on a complicated or logical question and finallyconclude with a sensible answer, but computers can never do so.
On the other hand, in some way, computers can replace teachers in language learning(topic sentence). In many countries, particularly in China, most English teachers have incorrectpronunciation in English. It is not unusual that Chinese students have a hard time tocommunicate with English native speakers due to an inaccurate sound producing methodwhich they have imitated from their Chinese teachers. However, if you go online to learn spokenEnglish with foreigners, you will be astonished to find that thousands of native Englishspeakers are available on Internet every day and they are willing to help you improve yourEnglish speaking skills. Through net-voice-chat, you are bound to speak good English with anassistance that you can never expect to be attached by Chinese teachers.
From above discussion, we can see that computers and teachers play different roles ineducation. We cannot just arbitrarily assert that teachers are not needed; on the contrary,we ought to take advantage of this teaching resource despite the application of computers ineducation.
雅思大作文范文：电脑与现代教育
Computers are now essential in many areas of life—modern banking, retail and informationexchange among others. However, this is not true for education. At a simple level somesubjects may be better taught using computers, but to explain important concepts a humanteacher is still indispensable.
There are some subjects in which a computer can be used successfully to teach. Elementarymathematics, elementary language leaning, any area which requires a student to memorizebasic facts through repetition is well suited to computer learning. The computer can beprogrammed to provide an endless number of simple questions, and as the student answersthese questions the facts are learned and reinforced.
However, in the learning and practice of more complex ideas, the computer is notadequate. A computer can evaluate an answer as right or wrong, but it cannot determinewhy. It cannot find out why a student is making mistakes, and then re-present importantconcepts in a different way so the student will understand. It cannot determine at what stagein a mathematics problem the student has made an error, it can only indicate that the finalanswer is wrong. Tasks involving reasoning cannot be taught by computers, as there are toomany variables for a computer to deal with successfully.
Thus, while computers may be useful as a tool for practicing simple skills, they are not anessential feature of modern education, because they cannot monitor a student's grasp ofconcepts, nor evaluate a student's reasoning. Until further developments in computers aremade the human teacher will remain indispensable.
雅思大作文范文：老年人与现代科技
It is obvious that advanced technologies suchas cellular phones or the net not only bring a lot offun to youngsters who are always passionate tonovel things, but also have an important effect onthe life of senior citizens who would like to keep the pace of the age.
Today, mobile phones are increasingly popular with old people. Unlike young people whofancy playing games or taking photos with phones, they seem to be most interested in theirmost basic function – communication. It is easily found that keeping in touch by mobiles withtheir children who live independently or study overseas has become a necessary thing in theirroutines. Plus, if some of old people feel physically uncomfortable or get in danger outdoorsand alone, they immediately make an emergency call or inform . their relatives or friends usingmobile phones.
The Internet is equally important with mobile phone in old people’s life now. Apparently,some elderly tend to surf on Internet, studying something that they are fascinated with suchas calligraphy , painting and so forth; some like to meet new people online or chat with theirfriends by tools available on Internet such as MSN or OICQ; others become accustomed toshopping online or running their own small businesses by E-bay.
However, I must confess that some old people are afraid to try new technologies probablybecause they do not yet have understood or experienced them. In avoid of this, they shouldbe encouraged to take part in some activities that are held in their community with the aim ofeducating them about how to use or see the new technologies. In the meanwhile , they arereally supposed to be a bit more confident.
雅思大作文范文：电脑与现代教育
Introduction shows main idea
Computers are now essential in many areas of life – modern banking, retail andinformation exchange among others. However, this is not true for education. At a simple levelsome subjects may be better taught using computers, but to explain important concepts ahuman teacher is still indispensable.
Why computers do well, with examples
There are some subjects in which a computer can be used successfully to teach. Elementarymathematics, elementary language leaning, any area which requires a student to memorizebasic facts through repetition is well suited to computer learning. The computer can beprogrammed to provide an endless number of simple questions, and as the student answersthese questions the facts are learned and reinforced.
What computers cannot be, with an example
However, in the learning and practice of more complex ideas, the computer is notadequate. A computer can evaluate an answer as right or wrong, but it cannot determinewhy. It cannot find out why a student is making mistakes, and then re-present importantconcepts in a different way so the student will understand. It cannot determine at what stagein a mathematics problem the student has made an error, it can only indicate that the finalanswer is wrong. Tasks involving reasoning cannot be taught by computers, as there are toomany variables for a computer to deal with successfully.
Conclusion re-states main ideas
Thus, while computers may be useful as a tool for practicing simple skills, they are not anessential feature of modern education, because they cannot monitor a student’s grasp ofconcepts, nor evaluate a student’s reasoning. Until further developments in computers aremade the human teacher will remain indispensable.