官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

EDUCATION REPORT - After 40 Years, Calculators in School Still Add Up to Debate

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
MP3节目录音 MP3节目录音  PDF节目文稿 PDF节目文稿 
文章正文
同步字幕

This is the VOA Special English Education Report.

Can you do the math: What is one hundred times four, divided by the square root of a hundred? If you know that, then you know the answer to this: How many years ago did three scientists at Texas Instruments invent the handheld electronic calculator?

The handheld electronic calculator was invented in 1967
The handheld electronic calculator was invented in 1967

The answer is forty. The scientists were Jerry Merryman, James Van Tassel and Jack Kilby. Their first device could add, subtract, multiply and divide. It had twelve bytes of memory -- close to nothing compared to today's powerful calculators. And it weighed more than a kilogram.

But it was powered by batteries. That meant it could be taken anywhere. Other electronic calculators had to be plugged into electricity. Not only that, they weighed close to twenty-five kilograms and were almost as big as typewriters.

In the United States, the National Council of Teachers of Mathematics says teachers at every level should support the use of calculators. Students are even permitted to use them when they take college entrance tests. That may surprise parents who still think of the days of paper-and-pencil only.

Yet after forty years, calculators in the classroom still add up to the same old debate.

Some education experts think calculators are used too much. Children, they say, learn to depend on these electronic brains instead of their own. Calculators may not only give students answers to questions they do not really understand, critics argue. They may also keep them from discovering ideas for themselves. The danger? Students who cannot even do simple addition and subtraction.

Other experts, though, say calculators have helped make mathematics more understandable to more students. They say calculators give students more time to understand and solve problems -- and to develop a better sense of what numbers mean. That way, the reasoning goes, they can study higher level ideas than they would otherwise. And they can feel better about their abilities.

What do teachers think? Generally they say calculators can be useful -- especially with more complex math. But they also say that young students should know basic operations before they begin using them.

What do you think of calculators in the classroom? Send your thoughts to special@voanews.com. Tell us about your own experience. And be sure to include your name and where you are from.

And that's the VOA Special English Education Report, written by Nancy Steinbach. Our reports are online with transcripts and MP3 files at www.unsv.com. I'm Steve Ember.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏公网安备 32010202011039号苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台