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Subject: EVOLUTION OF MATH

Subject: Evolution of teaching math

The evolution of teaching math since the 1950s:

1. 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?

2. 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?

3. Teaching Math In 1970

A logger sells a truckload of lumber for $100.
His cost of production is $80. Did he make a profit?

4. 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.

5. Teaching Math In 1990

A logger cuts down a beautiful forest because he is
selfish and
inconsiderate and cares nothing for the habitat of
animals or the
preservation of our woodlands.
He does this so he can make a profit of $20.
What do you think of this way of making a living?
Topic for class participation after answering the
question: How did the birds and
squirrels feel as the logger cut down their homes?
(There are no wrong answers.)

6. Teaching Math In 2006

Un hachero vende una carretada de maderapara $100. El
costo de la
producciones es $80.