358 



THE POPULAR SCIENCE MONTHLY. 



proved the incalculable value of inventional geometry in a school 

 course of study ; and eleven years' experience in many classes and 

 in different schools confirms that judgment. 



In all these classes the pleasure experienced in the study ha.s 

 made the work delightful both to teacher and taught ; and there 

 has always been a continuous interest from the beginning to the 

 end of the term. This pleasure and interest came, not from any 



environment, not from the peculiar individuality of the class, but 

 because the problems are so graded and stated that the pupil's 

 progress becomes one of self -development — a realization of the 

 highest law in education. 



The accompanying illustrations of the work of one class,* 



* The average age was about fourteen years. The illustrations are reproductions of 

 drawings made by the class, though in the usual class-work the lines would be finer. 



