## The Evolution of Teaching Math

**1. Teaching Math In 1950’s**

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’s**

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’s**

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’s**

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’s**

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, and if you feel like crying, it’s okay.)

**6. Teaching Math In 2008**

Un hachero vende una carretada de madera para $100. El costo de la producciones es $80. Cuanto dinero ha hecho el hachero?…