. The relation of the size of the class to school room efficiency. % 00 858075 GRADE II. 706560 5550 1 i 23 PI in oru - 10 - 21 - 2« - 5tless 15 20 25 3DSize o 1 2a Gr. Av. = Average promotion Rat FIGURE III. - 36 - 35 45 !2 f**4 Gr. 55 56 - up, ±fcc TO orll - 16 - 21 - 26 - 31 - 0 25 30 35Size of Glass. less . Av. = 36 - 46 - 56 -45 Average Promotion Rate forFIGURE IV, ? HI httI Grade. Ill U- OF I. S. S. FORM 3 % 95 GRADE IV. 90 35 80 75 70 65 60 55 2 21 P5| 1 10 orll1 ess ?ts=r- so . - 26 - 31 - 36 2d — — — Or. Ay. m Size of Class. 45 Average Promotion Rate forV. 46 - 5655 up Grade.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1914