清静莲花

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由一篇实验报告想到的

(2007-03-19 11:23:39) 下一个


    昨天女儿习非常兴奋地告诉我她的DT (Design Technology) 作品得了 95 分,这让我很开心,也大感意外。

    虽然她拉小提琴和弹钢琴时手指灵活总是被老师表扬,但由于平时家务活干得少,做事情时手却不灵巧。有一次她帮我削 3 个土豆,差不多用了 20 分钟。看着她笨手笨脚的样子,真有点哭笑不得。难道以她的水平,手工作品也能得高分?真有些不信啊。见我疑惑,她拿出总结报告给我看,读完之后,除了为她学到了知识而欣慰,同时也对她的老师充满了感激和敬意。

    老师给大家的题目是:《设计并制作一件能让小朋友高兴的玩具》。什么都可以,但要求同学们从构思、设汁、画图、用纸板做模型、到用木头做成品,这中间需要开料、安装、最后油漆上色,都必需自己独立完成。资料也是自己找,老师只在承重、受力方面作指导。

    她设计了一个啤酒桶,里面有只啤酒瓶,桶上有个按钮,按一下,啤酒就会跳出来。她在报告里并没有提及构思,一直都在讲制作过程。在制作的过程中她犯了两次严重的错误。第一次,由于用锤子不小心,就在模型即将完工的时侯被她一锤给砸扁了,不得不从头再来。第二个错误是由于没有考虑到纸板和木板的硬度不同,完全按纸板的大小开木料,结果,安装的时侯配合不好,不得不再作调整。虽然最后在规定的时间内完成了,但油漆却来不及上,就交上去了。

    到现在我也没看到成品,但以我对她使用工具的能力判断,成品一定不精致,而且跟据她所说的,这是件还没有 100% 完成作品。以我以前上学的经验看,如果在中国的学校,她能免强、混个及格也就不错了,而在这里老师却给了她如此的高分,差别究竟在哪里?

    我是学理科的,做过不少试验,但是我们无论是从方法还是评价标淮都与国外有很大的不同。首先,我们不可能自己控制试验方法和步骤,一切都是老师设计好的,学生只要照着执行就可以了,不用自己思考方案,做出选择。其次,老师非常在乎最后取得的数椐,如果数据不太好,实验报告别指望会得高分。所以会偷懒的学生根本不好好做实验,写报告的时候就根据公式算数据,再做小小的修饰,让数据看起来像真的一样,这样既不用费力还能得高分。而那些认真去完成的人呢,往往由于各种原因,数据一定没有算出来的好看,甚至有的数据大大超出了偏差范围。如果做实验的那个人再是个死心眼,把这些数据也算进去,那只好听天由命,老师想给几分是几分了,谁叫自己的数据不好看呢?

    这一比,一个不合理的现象就出现了,认真做事的人,得不到高分不被认可,费力不讨好;而投机取巧的人,却得高分,不费力气还得好处,因此大行其道。这样做不等于助长歪风邪气,这不是厂等于在抑善扬恶吗?如果中国的教育一直在这样的邪路上走,到底还能走多远?看到如今四处蔓延的学术腐败之风,难道不是这样的评价标准产生的必然结果吗?

    仔细想想,结果真那么重要吗?比如说我女儿做的那个玩具的完美程度,或是一个试验数据是否完全与公式相吻合。其实,这些一点都不重要。因为那样的玩具不知道有多少人能比她做得出色,评价精美程度对一个学生来讲,毫几意义。对学生来说,通过这个制作过程,学会用自己的头脑去创造一样东西,在完成的过程里,通过失败总结教训,不断完善、熟练,最后达成目标,这才是老师应该鼓励和教导的。同样的道理,去证明一个前人已经证明过了的公式,学生得出来的数据是否准确、好看,也没有什么实际意义,重要的是会做实验、正确处理数据的方法,在将来的研究中去运用说学的这些知识。

    几乎所有的人都痛恨艰苦的劳动,都期望天上掉馅饼,不劳而获,这也是人的天性。可惜世上没有这等好事,想走捷径,往往一无所获,竹篮打水一场空,到无法挽回的时候再后悔就太晚了。即使我们在现实生活中常看到有些人一时运气好,靠耍手段一步登天,但并不能持久,最后还是怎么上去的就怎么摔下来,邪门歪道终究难成正果。

    同样的学生,如果用不同的教育理念来教学,用不同的衡量标准去塑造,最后的结果一定有很大的差别。俗话说不怕不识货就怕货比货,孰优孰劣,相形之下自然一目了然了。


附:孩子的 DT Report

My project for DT this term is a barrel and wine. It works by first moving the two bars on the bottom into outer direction which gives input to the upper bars. Because of this force which made the bars behind the barrel enough force, the bars makes a horizontal line from the 60 degree angle it was making earlier. Since the two bars behind the angle is now a horizontal line, the long bar vertically attached to the two bars have enough height to make my wine stand up making it seem that whenever the barrel opens, the wine sticks out.

For this project, I believe I didn’t do as well as I planned. I got the idea from the egg and chick project that Mr. Edmonds showed us before the project started. First, I believe when I was making the cardboard model, I did not consider the facts that I’m going to use actually use masonite. Because of this mistake, my project did not move as easily as I thought it would be since masonite was actually hard unlike cardboard. I have to admit that I spent to much time cutting straight lines on my wood even though there was a machine that I could have used which could easily done the job for me.

One thing I believed I done pretty well was that my bars and the barrel were cut pretty well considering it was hand cut. The construction actually went pretty well since I knew what I was doing but soon, another problem encountered- I need to drill holes. Drilling holes using the drill press wasn’t hard but the lining up was a big problem. For example, I may be only need to drill one hole or two but the lining up takes at least 10 minute or more. Since class time has only 50 minutes in total. I always seem to be running out of time. I quickly solved this problem by asking to stay after school to work on the project. That way there is way less people and I were able to do most of my drilling. It’s not long before something else terrible has happened. When I was trying to attach my holes using the clips, I hammered it too hard so the parts broke. This meant that I have to REDO EVERYTHING again! I was lucky enough I have enough material left and I’ve cut some extra bars just incase.

The second time when I’m doing my project I was careful enough not to break anything and it worked but the vertical bar was another problem. The vertical bar caused a major problem because it was not thin enough to fit in the area of space I need it to fit in. So I had reattach everything just to fix the pins so I could have attach the bar on the back of the project. Gladly it worked but because there is so little time left when I finished attaching and finally finished my project, I didn’t have time to paint it.

From this project, I learned you should be careful and do well in EVERY step in the procedure, so that way you don’t have to redo the thing and waste time. I was kind of satisfied that I actually got to the finishing point (except for the painting) and next time, I hope that I can manage time even more better. 



 

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清静莲花 回复 悄悄话 回复graceusa的评论:

就是阿,这些让人讨厌的做法也是我们的教育制度的产物。现在的教育好像是搞得红红火火,但如果指导思想出了毛病,犹如在沙地上起大厦,长久不了。教育关乎国家未来,这样下去贻害无穷。
清静莲花 回复 悄悄话 小艾,你知道她最喜欢干什么吗?day-dreaming

这孩子一时一时的,有时很认真,有时很不认真。
graceusa 回复 悄悄话 这句是重点:如果用不同的教育理念来教学,用不同的衡量标准去塑造,最后的结果一定有很大的差别。

我现在仍然接触很多中美两个体制下出来的学生,总体说来各有利弊,但比较起来中国学生容易有投机取巧倾向,这点我非常不喜欢。
艾丽思笔记 回复 悄悄话 偷偷告诉小莲,我比较喜欢那些简单的,不用动脑子的活儿,做的时候可以走神,可以胡思乱想:))

你的小孩很聪明啊,有灵气的!
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