The effect of promotion rates on school efficiency
Reprinted from the American school board journal, May, 1913
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Ayres, Leonard Porter, 1879-1946. The effect of promotion rates on school efficiency. Lex, lex-books.com/book/the-effect-of-promotion-rates-on-school-efficiency-a84c9bed-3a1e-4930-acaf-ee6f3757f409.Ayres, L. P. (n.d.). The effect of promotion rates on school efficiency. Lex. https://lex-books.com/book/the-effect-of-promotion-rates-on-school-efficiency-a84c9bed-3a1e-4930-acaf-ee6f3757f409Ayres, Leonard Porter, 1879-1946. The effect of promotion rates on school efficiency. Lex. https://lex-books.com/book/the-effect-of-promotion-rates-on-school-efficiency-a84c9bed-3a1e-4930-acaf-ee6f3757f409.











