Haggerty: Study in Arithmetic 



453 



Granting this and fixing the maximum variability much higher 

 than Mr. Courtis's figure, say from 20 per cent to 25 per cent, it 

 seems that present work in the Indiana schools leaves much to be 

 desired. It is a fair guess that the exceedingly high figures shown 



80 



70 - 



60 



SO 



40 



30 



WERAGE 

 RIGHTS 



20 13 



i AVERAGE 

 nATTEHi*!*^ 



20 - 



FIg^l- VARI\BmTY" SERIES B ' GRADE b DIVISION 



in Table XXXVII are due to our constant failure to know the 

 needs of individual children. They indicate the failure of our 

 group methods of instruction. He who would reduce these figures 

 for his school must learn how to administer to individual children. 

 He niust know what the attainment for a particular grade should 



