In this paper, the history of instructional psychology is first briefly reviewed, according to Glaser (1982), which was emphasized that a linking science, namely instructional psychology, is needed to intervene between learning theory and educational practice. Then, the development of three programs of instructional research ¾ for the acquisition of proceduralized knowledge, the development of regulatory strategies, and the structuring of knowledge for problem solving ¾ are introduced, according to Glaser (1990). Since instructional experimentation is now of increasing value, Glaser (1990) forecass the reemergence of learning theory within these instructional researches. Finally, this paper concludes and stresses that it is important for educational philosophy, educational practice, and instructional psychology to interact, communicate and modify mutually.