Mofiroe: Progress and Pro^notion 



37 



In Table XV there is given the average retardation and 

 acceleration for the school systems having annual promotion. 

 Here the variability is somewhat greater but probably less 

 than we should expect. The average retardation for this 

 group is 14.9 per cent, almost identical with Cubberley's 

 standard. 



TABLE XV 



Average Retardation (Overage) and Acceleration (Underage) in 

 School Systems Having Annual Promotion 



system 



RETARDATION 



acceleration 



A 



6.6 



25.6 



B 



6.7 



20.9 



Kj 



7 7 



QO Q 



D ' 



10.1 



15.0 



E 



10.1 



22.6 



F 



10.4 



35.5 



G 



11.3 



23.1 



H 



11.3 



18.2 



I 



11.6 



22.6 



J 



11.8 



26.3 



K 



12.5 



14.9 ■ 



L 



12.7 



16.2 



M 



14.2 



17.2 



N 



14.9 



24.0 



0 (Marshall County) 



17.4 



15.0 



P 



17.6 



21.7 



Q (Township School System) 



17.9 



15.1 



R 



18.6 



16.4 



S 



19.0 



22.2 



T 



19.7 



16.4 



Average 



14.9 



18.4 



Comparison with Similar Data from Other States. A com 



prehensive study for the elementary school of 227 cities in 

 Michigan^*^ according to the same method of computing the 

 retardation showed 24.0 per cent of retardation and 6.5 per 

 cent of acceleration. This study was based on data collected 

 in December, 1915, but the age was taken on the day the re- 

 port was made instead of September 1, as in the present study. 

 This would tend to increase slightly the am.ount of retarda- 

 ' tion, but certainly not enough to account for this difference. 

 Thus, we are justified in saying that altho Tables I to VI 

 show that conditions are not satisfactory, this group of In- 



10 Berry, C. S. "A Study of Retardation, Acceleration, Elimination, and Repetition 

 in the Public Elementary Schools of Two Hundred Twenty-five Towns and Cities of 

 Michigan, 1915." 



i 



