Haggerty: Studies in Arithmetic 

 TABLE II.— MEDIAN SCORES (June, 1915) 



81 



Grade 



Addition 



Num- 

 ber 

 in 



Grade 



a 



Subtraction 



SI 



T5 



Multiplication 



Division 



ft 



6B 



83 



9.7 



6 



9 



72 



8 



1 



6 





74 



6 



6 



4 



4 



67 



5 



8 



4 



3 



75 



6A 



83 



10.5 



7 



5 



71 



9 



1 



7 



2 



79 



7 



4 



4 



7 



64 



6 



7 



5 



4 



81 



7B 



63 



10.8 



8 



1 



75 



9 



5 



7 



6 



80 



7 



8 



4 



7 



61 



7 



3 



6 



4 



88 



7A 



67 



11.8 



8 



4 



71 



10 



1 



7 



2 



71 



8 



7 



5 



4 



62 



8 



8 



7 



5 



85 



8B 



65 



12. 



9 



3 



78 



10 



8 



8 



3 



77 



9 



4 



6 



2 



66 



9 



2 



8 





87 



8A 



62 



13.7 



10 



4 



76 



11 



9 



9 



7 



82 



10 



2 



6 



7 



66 



11 



1 



9 



8 



89 



Total... 



423 









































The change from February to June in median scores and 

 dependability is shown in Table III and graphically in Figure I. 

 Note the growth from grade to grade in examples right from 6.9 

 in 6B grade to 10.4 in grade 8A, a gain of 3.5 examples. Note also 

 that 6.9 was the highest score made in February and that by 

 the 8B grade. In June 6.9 was the lowest score and was made by 

 6B. In accuracy all classes were above 70 per cent, and the gain 

 from February to June ranged from 8 per cent in the 6B grade to 

 21 per cent in the 8A grade. 



TABLE III.— MEDIAN SCORES: ADDITION (February and June) 



Depend- 

 ability 



Grade 6B. 



Grade 6A. 



Grade 7 A. 



Grade 8B. 



Grade 8A. 



) February. 

 [June 



February. 



June 



Grade 7B {^T^'''' 



/February. 



■ * ■ \june 



/February. 



\June 



j February. 

 ' \ June 



8 



7 



5 



5 



64 



9 



7 



6 



9 



72 



9 





5 



3 



59 



10 



5 



7 



5 



71 



9 



7 



5 



6 



60 



10 



8 



8 



1 



75 



9 



8 



6 





62 



11 



8 



8 



4 



71 



11 



4 



6 



9 



61 



12 





9 



3 



78 



11 



5 



6 



3 



55 



13 



7 



10 



4 



76 



6—4908 



