Contents 



Introduction 385 



Part I. A Comparative Study of Twenty Indiana Cities. 



Tests and Methods 389 



Cities Cooperating 390 



Results: Tables 390 



Results: Graphs ; 424 



Median Scores 430 



Specific Character of Habits 445 



Variability 445 



Dependability 446 



Part II. Courtis Tests as Instrument of Research: Time of Be- 

 ginning Arithmetic and Time De\otzd to Arithmetic. 



General Considerations 476 



A. Time of beginning Arithmetic 482 



B. Time devoted to Arithmetic 489 



Indiana Standard Chart 505 



Conclusion 507 



Bibliography 508 



(387) 



