A reader sends this item:

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

**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 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 2005 ..... ** El hachero vende un camion carga por $100. La cuesta de production es 4/5.............

[Reference to 1990's education

** Courtesy of Nilesh Panandikar]