From a series of lectures, a selection of eight are oriented principally toward the biologically developing child, and the physiological operations in visual process. The numbered lectures are--(1) The Coordinated Classroom, its Philosophy and Principles, (2) An Outline of a Biological Point of View, (3) The Evolution of Structure--despite man's adaptability, he can not ignore nature's laws, (4) Some Principles of Growth and Development--material presented for the purpose of providing reader and author with a common starting point for discussing some phenomena occurring in children engaged in visually centered activities of the classroom, (5) A Dynamic Point of View, Part One--the organism constantly tries to shape itself and its internal balances to the forces in its particular surroundings to reduce the stress of those forces, (11) An Outline of Vision and Seeing, (12) Vision, Growth and Development, (13) Vision as a Dynamic Process, Part One, and (15) Vision and Lighting, Part One--promoting efficient vision requires a concern for more than quantities of light and distribution. Also included is 'An Outline for Further Study' abstracted from the series "Vision, Growth, and Development", January 1949, by D.B. Harmon. Related bibliographic material is cited throughout the work. (KK)