清靜蓮花

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由一篇實驗報告想到的

(2007-03-19 11:23:39) 下一個


    昨天女兒習非常興奮地告訴我她的DT (Design Technology) 作品得了 95 分,這讓我很開心,也大感意外。

    雖然她拉小提琴和彈鋼琴時手指靈活總是被老師表揚,但由於平時家務活幹得少,做事情時手卻不靈巧。有一次她幫我削 3 個土豆,差不多用了 20 分鍾。看著她笨手笨腳的樣子,真有點哭笑不得。難道以她的水平,手工作品也能得高分?真有些不信啊。見我疑惑,她拿出總結報告給我看,讀完之後,除了為她學到了知識而欣慰,同時也對她的老師充滿了感激和敬意。

    老師給大家的題目是:《設計並製作一件能讓小朋友高興的玩具》。什麽都可以,但要求同學們從構思、設汁、畫圖、用紙板做模型、到用木頭做成品,這中間需要開料、安裝、最後油漆上色,都必需自己獨立完成。資料也是自己找,老師隻在承重、受力方麵作指導。

    她設計了一個啤酒桶,裏麵有隻啤酒瓶,桶上有個按鈕,按一下,啤酒就會跳出來。她在報告裏並沒有提及構思,一直都在講製作過程。在製作的過程中她犯了兩次嚴重的錯誤。第一次,由於用錘子不小心,就在模型即將完工的時侯被她一錘給砸扁了,不得不從頭再來。第二個錯誤是由於沒有考慮到紙板和木板的硬度不同,完全按紙板的大小開木料,結果,安裝的時侯配合不好,不得不再作調整。雖然最後在規定的時間內完成了,但油漆卻來不及上,就交上去了。

    到現在我也沒看到成品,但以我對她使用工具的能力判斷,成品一定不精致,而且跟據她所說的,這是件還沒有 100% 完成作品。以我以前上學的經驗看,如果在中國的學校,她能免強、混個及格也就不錯了,而在這裏老師卻給了她如此的高分,差別究竟在哪裏?

    我是學理科的,做過不少試驗,但是我們無論是從方法還是評價標淮都與國外有很大的不同。首先,我們不可能自己控製試驗方法和步驟,一切都是老師設計好的,學生隻要照著執行就可以了,不用自己思考方案,做出選擇。其次,老師非常在乎最後取得的數椐,如果數據不太好,實驗報告別指望會得高分。所以會偷懶的學生根本不好好做實驗,寫報告的時候就根據公式算數據,再做小小的修飾,讓數據看起來像真的一樣,這樣既不用費力還能得高分。而那些認真去完成的人呢,往往由於各種原因,數據一定沒有算出來的好看,甚至有的數據大大超出了偏差範圍。如果做實驗的那個人再是個死心眼,把這些數據也算進去,那隻好聽天由命,老師想給幾分是幾分了,誰叫自己的數據不好看呢?

    這一比,一個不合理的現象就出現了,認真做事的人,得不到高分不被認可,費力不討好;而投機取巧的人,卻得高分,不費力氣還得好處,因此大行其道。這樣做不等於助長歪風邪氣,這不是廠等於在抑善揚惡嗎?如果中國的教育一直在這樣的邪路上走,到底還能走多遠?看到如今四處蔓延的學術腐敗之風,難道不是這樣的評價標準產生的必然結果嗎?

    仔細想想,結果真那麽重要嗎?比如說我女兒做的那個玩具的完美程度,或是一個試驗數據是否完全與公式相吻合。其實,這些一點都不重要。因為那樣的玩具不知道有多少人能比她做得出色,評價精美程度對一個學生來講,毫幾意義。對學生來說,通過這個製作過程,學會用自己的頭腦去創造一樣東西,在完成的過程裏,通過失敗總結教訓,不斷完善、熟練,最後達成目標,這才是老師應該鼓勵和教導的。同樣的道理,去證明一個前人已經證明過了的公式,學生得出來的數據是否準確、好看,也沒有什麽實際意義,重要的是會做實驗、正確處理數據的方法,在將來的研究中去運用說學的這些知識。

    幾乎所有的人都痛恨艱苦的勞動,都期望天上掉餡餅,不勞而獲,這也是人的天性。可惜世上沒有這等好事,想走捷徑,往往一無所獲,竹籃打水一場空,到無法挽回的時候再後悔就太晚了。即使我們在現實生活中常看到有些人一時運氣好,靠耍手段一步登天,但並不能持久,最後還是怎麽上去的就怎麽摔下來,邪門歪道終究難成正果。

    同樣的學生,如果用不同的教育理念來教學,用不同的衡量標準去塑造,最後的結果一定有很大的差別。俗話說不怕不識貨就怕貨比貨,孰優孰劣,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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清靜蓮花 回複 悄悄話 回複graceusa的評論:

就是阿,這些讓人討厭的做法也是我們的教育製度的產物。現在的教育好像是搞得紅紅火火,但如果指導思想出了毛病,猶如在沙地上起大廈,長久不了。教育關乎國家未來,這樣下去貽害無窮。
清靜蓮花 回複 悄悄話 小艾,你知道她最喜歡幹什麽嗎?day-dreaming

這孩子一時一時的,有時很認真,有時很不認真。
graceusa 回複 悄悄話 這句是重點:如果用不同的教育理念來教學,用不同的衡量標準去塑造,最後的結果一定有很大的差別。

我現在仍然接觸很多中美兩個體製下出來的學生,總體說來各有利弊,但比較起來中國學生容易有投機取巧傾向,這點我非常不喜歡。
艾麗思筆記 回複 悄悄話 偷偷告訴小蓮,我比較喜歡那些簡單的,不用動腦子的活兒,做的時候可以走神,可以胡思亂想:))

你的小孩很聰明啊,有靈氣的!
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