Author

Leonard Porter Ayres

6 titles available
Cover of Open-air schools by Leonard Porter Ayres

Open-air schools
Cover of Health Work in the Public Schools by Leonard Porter Ayres

Health Work in the Public Schools
Cover of An index number for state school systems by Leonard Porter Ayres

An index number for state school systems
Cover of Laggards in our schools by Leonard Porter Ayres

Laggards in our schools

Turning points in business cycles
Cover of The money cost of repetition versus the money saving through acceleration by Leonard Porter Ayres

The money cost of repetition versus the money saving through acceleration

About Leonard Porter Ayres

Free ebooks by Leonard Porter Ayres available for download.