The effect of promotion rates on school efficiency,
Ayres, Leonard Porter, 1879-1946.
The effect of promotion rates on school efficiency, by Leonard P. Ayres ... - New York City, Division of Education, Russell Sage Foundation, 1913. - 13 p. diagrs. 23 cm. - [Russell Sage Foundation, New York. Dept. of Child Hygiene. Pamphlet] E130 .
Reprinted from the American school board journal, May, 1913.
e 13000939
Promotion (School)
School attendance.
LB3063 / .A9
The effect of promotion rates on school efficiency, by Leonard P. Ayres ... - New York City, Division of Education, Russell Sage Foundation, 1913. - 13 p. diagrs. 23 cm. - [Russell Sage Foundation, New York. Dept. of Child Hygiene. Pamphlet] E130 .
Reprinted from the American school board journal, May, 1913.
e 13000939
Promotion (School)
School attendance.
LB3063 / .A9