"That Education should be based on Psychology is nowadays generally recognized. But it is obvious that in so far as our psychology is false, our practice will tend to go astray, and the more conscientiously we base our practice on our theory, the worse will be the outcome. Our knowledge of the psychology of the young child is still in its infancy. Only by the devoted work of many observers shall we be able to form a clear conception of the nature and needs of the human mind at all its different stages. To this end this little book is a contribution in a definitely limited sphere"--Preface. (PsycINFO Database Record (c) 2015 APA, all rights reserved).