British Maths Teaching Over the years

1. Teaching Maths In 1970
A logger sells a truckload of timber for £100.
His cost of production is 4/5 of the price.
What is his profit?

2. Teaching Maths In 1980
A logger sells a truckload of timber for £100.
His cost of production is 4/5 of the price, or £80.
What is his profit?

3. Teaching Maths In 1990
A logger sells a truckload of timber for £100.
His cost of production is £80.
Did he make a profit?

4. Teaching Maths In 2000
A logger sells a truckload of timber for £100.
His cost of production is £80 and his profit is £20.
Your assignment: Underline the number 20.

5. Teaching Maths In 2008
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. )