Anyone who has chuckled over the various versions of the “you have two cows” political system paradigm will enjoy this math paradigm.
Teaching Math in 1950: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 subset of set “M” and answer the following question: What is the cardinality of the set “P” of profits?
Teaching Math in 1980:
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.
Teaching Math in 2010:
El hachero vende un camion cargado de lena por $100. Su gasto de produccion es……..
Of course the temptation is always to personalize something like this, and I have to admit that I did learn math with the 1970’s system. That’s actually pretty close–hee, hee, it’s a great parody. Now that I am myself a teacher, must also admit that I use the 2010 method with my students. Pero mis estudiantes son los madres de los que estudian matematica. Their children speak perfectly fluent English and often help their parents translate.
(via Arul John‘s joke pages )