ZT: 教改50年 Teaching math over 5 decades

CanMa2011

灿妈,侃妈
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2011-05-05
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Last week I purchased a burger at Burger King for $1.58. The counter girl took my $2 and I was digging for my change when I pulled 8 cents from my pocket and gave it to her. She stood there, holding the nickel and 3 pennies, while looking at the screen on her register. I sensed her discomfort and tried to tell her to just give me two quarters, but she hailed the manager for help. Why do I tell you this?

Because of the evolution in teaching math since the 1950s:

1. Teaching Math In 1950s
A logger sells a truckload of lumber for $100.. His cost of production is 4/5 of the price. What is his profit ?

2. Teaching Math In 1960s
A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price, or $80. What is his profit?

3. Teaching Math In 1970s
A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?

4. Teaching Math In 1980s
A logger sells a truckload of lumber for $100. His cost of production is $80 and his profit is $20. Your assignment: Underline the number 20 ..

5. Teaching Math In 1990s
A logger cuts down a beautiful forest because he is selfish and inconsiderate and cares nothing for the habitat of animals or the preservation of our woodlands. He does this so he can make a profit of $20. What do you think of this way of making a living? Topic for class participation after answering the question: How did the birds and squirrels feel as the logger cut down their homes? (There are no wrong answers, and if you feel like crying, it's ok.)

6. Teaching Math In 2000s
If you have special needs or just feel you need assistance because of race, color, religion, sex, age, childhood memories, criminal background, then don't answer and the correct answer will be provided for you. There are no wrong answers.
 
现在这里的学校在小学二年级就要求准备计算器了。:mad::mad::mad:
 
大学里教FINANCIAL的老师上课时要用计算器算15X15。。。....
 
照样出ROCK SCIENTISTS。同时,又不需要人人都去做ROCK SCIENTISTS。
 
照样出ROCK SCIENTISTS。同时,又不需要人人都去做ROCK SCIENTISTS。

不能只看出了ROCK SCIENTISTS,regular population也不能太差了吧?
 
一般的人就是懂个微积分又有啥用呢?

其实这里说的MATH是我们中文里的算术,就是+-X /, 不是数学。微积分属数学范畴啦!偷换概念!:p
 
你说呢?.....不然挨千刀还是挨900刀都数不清。。。。有不有啊。。。
 
我母亲心算绝对利害。例如,3.45/一斤,重量2.34斤,结果她几秒就算出来,分文不差。可又有什么用呢?

这三位数乘法,我是心算不出来。
 
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