Mathematik im Wandel
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Aus einem Handzettel, der an deutschen Schulen kursiert ....
Thema: Rechnen, Mengenlehre und Rechtschreibreform
Volksschule 1960
"Ein Bauer verkauft einen Sack Kartoffeln für 50 Mark. Die Erzeugerkosten betragen 40 Mark. Berechne den Gewinn?"
Realschule 1970
"Ein Bauer verkauft einen Sack Kartoffeln für 50 Mark. Die Erzeugerkosten betragen vier Fünftel des Erlöses. Wie hoch ist der Gewinn?"
Gymnasium 1980
"Ein Agrarökonom verkauft eine Menge subterraner Feldfrüchte für eine Menge Geld (G). G hat die Mächtigkeit 50. Für die Elemente aus G gilt: G ist 1. Die Menge der Herstellungskosten (H) ist um 10 Elemente geringer als die Menge G. Zeichnen Sie das Bild der Menge H als die Teilmenge der Menge um G und geben Sie die Lösungsmenge (L) für die Frage: Wie mächtig ist die Gewinnsumme?"
Gesamtschule 1990
"Ein Bauer verkauft einen Sack Kartoffeln für 50 Mark. Die Erzeugerkosten betragen 40 Mark und der Gewinn 10 Mark. Unterstreiche das Wort KARTOFFEL und diskutiere mit deinem Nachbarn darüber!"
Schule 2000 (nach Einführung der Rechtschreibreform)
"Ein kapitalistisch priwelegirter bauer bereichert sich an einem sack katoffeln um 10 euros. Untersuch das tekst auf inhaltliche feler, korigiere das aufgabengestaltung unt demonstrire gegen die lösunk."
Schule 2010
"es gipt keine katofeln mer."
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... dasselbe passiert aber auch in den USA:
TEACHING MATH THROUGH THE YEARS
Teaching Math in 1960: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price. What is his profit?
Teaching Math in 1960: 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?
Teaching Math in 1970: A logger exchanges a set "L" of lumber for a set "M" of money. The cardinality of set "M" is 100. Each element is worth one dollar. Make 100 dots representing the elements of the set "M." The set "C," the cost of production, contains 20 fewer points than set "M." Represent the set "C" as a subset of set "M" and answer the following question: What is the cardinality of the set "P" for profits?
Teaching Math in 1980: A logger sells a truckload of lumber for $100. Her cost of production is $80 and her profit is $20. Your assignment: Underline the number 20.
Teaching Math in 1990: By cutting down beautiful forest trees, the logger makes $20. What do you think of this way of making a living? Topic for class participation after answering the question: How did the forest birds and squirrels feel as the logger cut down the trees? There are no wrong answers.
Teaching Math in 1996: By laying off 40% of its loggers, a company improves its stock price from $80 to $100. How much capital gain per share does the CEO make by exercising his stock options at $80? Assume capital gains are no longer taxed, because this encourages investment.
Teaching Math in 1997: A company out-sources all of its loggers. The firm saves on benefits, and when demand for its product is down, the logging work force can easily be cut back. The average logger employed by the company earned $50,000, had three weeks vacation, a nice retirement plan and medical insurance. The contracted logger charges $50 an hour. Was outsourcing a good move?
Teaching Math in 1998: A laid-off logger with four kids at home and a ridiculous alimony from his first failed marriage comes into the logging-company corporate offices and goes postal, mowing down 16 executives and a couple of secretaries, and gets lucky when he nails a politician on the premises collecting his kickback. Was outsourcing the loggers a good move for the company?
Teaching Math in 1999: A laid-off logger serving time in Folsom for blowing way several people is being trained as a COBOL programmer in order to work on Y2K projects. What is the probability that the automatic cell doors will open on their own as of 00:01, 01/01/00?