This is an OCR edition without illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from GeneralBooksClub.com. You can also preview excerpts from the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Original Published by: Allyn and Bacon in 1920 in 120 pages; Subjects: Education; Teaching; Education / General; Education / Administration / General; Education / Educational Psychology; Education / History; Education / Special Education / General; Education / Teaching Methods & Materials / General; Education / Philosophy & Social Aspects; Education / Professional Development;