"Educational psychology is the science of education." - This definition was given by

Educational psychology involves two words “Education” and “Psychology”.  It is the systematic study of the development of the individual in the educational setting Educational Psychology applies the knowledge of psychology to explain the phenomenon of Education.

• It is the scientific study of human behavior by which it can be understood, predicated, and directed by education to achieve the educational goals of life. In other words, it deals with human behavior in educational situations.

Important Points

Definition of Educational Psychology: 

• E. A. Peel: “Educational psychology is the science of education”. In the words of E.A. Peel, “Educational psychology helps the teacher to understand the development of his pupils, the range and limits of their capacities, the processes by which they learn and their social relationships.”
• The nature of educational psychology is regarded as scientific because it is an organized, systematic, and universally accepted body, wherein the facts remain constantly in search of truth through research and experimentation.
• Employs scientific methods in its study and its results are subject to further verification and modification. The results of any study in educational psychology can be challenged and are modified or altered in terms of the latest explanations and findings

Thus, it is concluded that the "Educational psychology is the science of education." - This definition was given by E. A. Peel.

Hint 

• B.F. Skinner: "Educational psychology is the branch of psychology that deals with teaching and learning." 
• Crow and Crow: “Educational psychology describes and explains the learning experiences of an individual from birth to old age”