will have a different one. They can all work at the board,
simultaneously. The amount of time used for exercises of this sort need
not be great, and the value received is incalculable.

If the teacher wishes to review briefly on the military, diplomatic,
social, political, or economic history of the people the class have been
studying, it is no difficult matter to arrange a set of questions, the
occasional review in which will clinch in the student's mind what
otherwise would surely be forgotten. Such questions as the following on
the financial history of the United States are each answerable with a
few words and will serve as an illustration of the method which may be
employed in reviewing any other phase of history:--

1. By what means was trade accomplished before the use of money?

2. What are the functions of money?

3. What determines the amount of money needed in a country?

4. What has been used for money at various periods of our history?

5. What is meant by doing business on credit?

6. What is cheap money?

7. What is Gresham's Law?

8. What is the effect of large issues of paper money on prices?

9. What is the effect of large issues of paper money on wages?