A man who had $10,000 lost 25 per cent of his money. How much did he lose?
A horse which cost $250 was sold at a loss of 10 per cent. How much did the owner lose?
A house which cost $25,000 was burned. It was insured for 50 per cent of its value. How much did the owner receive from the insurance company?
A suit of clothes which cost the dealer $18 was sold at a gain of 25 per cent. How much did the dealer gain on the suit?
14. Which would be better, to tell a group of children of a trip which you took to a cattle ranch, show them pictures, and possibly read a description of ranch life, or spend the same amount of time questioning these same children in the hope of developing some adequate idea of this type of life? If you follow the first method, could you be sure that children had derived accurate ideas from your description?
15. Write a series of questions which you would use in developing the generalization, “Men who live in cities are dependent upon those who live in the country for the necessities of life.”
16. How would you defend the following statement: It is more important that a pupil should have worked out the solution of a single problem in which he is interested, than that he should have learned, without solving the problems for himself, the answers to a dozen problems from books which he is asked to read.
17. Why do most lessons in which pupils recite from the material assigned in textbooks require little thinking? How can such lessons be made to stimulate thinking?
18. Would you ever allow children to accept an incomplete generalization as a result of their own experience and thought? An incorrect generalization?