Teacher and student activity in the developmental learning environment of school: issues of diagnostics, adaptation and social activity

The article presents the analysis of such concepts as "activity", "subjective experience", "diagnostics," "adaptation", "learning environment", “students”, “social activity” that allows the authors to define their vision of these categories; to help a teacher to design the learning process for a given purpose and the school administration to organize the process of adaptation to solving new types of tasks for students.