Henrietta Mears and How She Did It

Henrietta Mears and How She Did It by Ethel May Baldwin. paperback edition. ISBN: 9780830700189.

a Christian educator, evangelist and author who had a significant impact on evangelical Christianity in the 20th century and one of the founders of the National Sunday School Association. Best known as the innovative and dynamic Director of Christian Education at First Presbyterian Church of Hollywood, California and in charge of the college and young adult people in the mid 1900s, she built a dedicated, enthusiastic staff, trained and mentored her teachers and implemented a graded, age-appropriate curriculum from “cradle roll” to adults. - from Wikipedia