P.Ya. Galperin’s psychological conception: On some directions and prospective of further development.

Theoretical and methodological problems related to the status of the P.Ya. Galperin’s psychological conception are considered. Three main directions of this conception are analyzed as a method of exploration of formation and development of human mental activity; as a basis for improvement of learning and instruction processes; consideration the process of the planned stage-by-stage formation as a psychological reality. The last aspect is emphasized; problems occurred as well as some opportunities of their solution are outlined.