由於有一位補習學生極之有危機意識，於是放暑假時，栗子妹便開始備課，溫習一下中四的數學和附加數學課程。
先說二元一次方程，當中關於根的和積問題，以前明明是歸數學科的，現在竟然搬到附加數學的課程中！那麼容易的東西，有辱附加數之名呀！
再說多項式，不是學生說起，我都沒察覺，原來初中數學課程沒教過除法！只教加減乘而不教除，不奇怪的嗎？
還有二次不等式，簡簡單單地跟學生說「大過要兩邊，細過要中間」不就行了嗎？又列表又解釋的一大堆，看得栗頭暈眼花啊！
雖然邊看邊罵，但翻到 MI 一課便又立即滿心歡喜。在附加數學的課程中，栗子妹最喜歡的就是這一課了。
有數教的日子，陽光特別燦爛！
(按：MI 是 Mathematical Induction 數學歸納法，不是湯告魯士的 Mission Impossible 啊！)
在下睇到d方程式就會頭暈眼花呀?!
回覆刪除[版主回覆09/18/2008 20:48:00]我剛巧相反，看見便會精神為之一振
數學....我家有5兄弟姊妹, 我有2個哥哥2個細佬, 佢哋個個都係數學奇才, 而我, 就係數學蠢才, 由細到大都數學都未合格過. 至今, 17+28都仍然要諗餐死!
回覆刪除[版主回覆09/18/2008 20:49:00]Nicole: 不要緊、不要緊。計數這回事，可以叫老公代勞嘛
Do you have English terms for stuff like 二元一次方程, 根的和積問題, 多項式, 二次不等式?
回覆刪除I have a good math background, but don't know what you're referring to
[版主回覆09/19/2008 08:03:00]Dear Teach: They are 'quadratic equations', 'sum and product of roots (of quadratic equations)', 'polynomials' and 'quadratic inequalities' respectively.
I think students would benefit more if they learn MI till they are in U. My students only know that in order to proof a theorem, they need to follow a series of steps [P(1) is true --> assume P(k) is true, consider P(k+1) --> If P(k+1) is true, it is true for all values.]
They can't appreciate the 'beauty' of this method :)
By the way, I remember what induction is. I didn't learn it until I was in U. I am impressed that they're teaching it in Form 4 here. It is a method of proving a theorem which could not be proven the conventional way, right?
回覆刪除Do you invest in US stocks? I am not sure about The Economist editorial board, but I assure you it will have well thought out articles on the subject soon enough.
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Yahoo has a news item on its front page most of yesterday which scared the pants off everybody, but the market rebounded anyway.
[版主回覆09/23/2008 20:10:00]Dear Teach: I don't invest in US stocks, but the US stock market will affect the HK stock market ...
'The Economist' offers us ample of articles about the financial tsunami. I think the best one in the current issue is 'What next?' Take a look when you have time.
萬科不離數學, 現在要我去做數倒好傷腦的
回覆刪除[版主回覆09/23/2008 20:12:00]無蹟：那便不要計嘛，讓別人代勞好了
栗子妹,你好勵害呀!若你生於從前,可能已成了女壯元。最難得係你重有時間睇戲睇書和睇劇呢。
回覆刪除[版主回覆09/23/2008 20:19:00] 南爾過獎了！我公開試的成績只屬一般，不過替人補了十多年數學，由恨生愛。
對栗子妹來說，書是生命，戲是精神食糧，二者缺一不可。至於劇嘛，有得煲便煲，沒得煲便拉倒。