In addition to teaching in human society, there are also activities such as non-professional learning and professors that fail to trigger learning. Even teaching does not only exist in schools, but occurs in all aspects of human social life. In the field, humans have been engaged in a variety of educational activities long before the emergence of modern schools: after the emergence of modern schools, human educational activities still occur widely in the field of social life outside the school. Limiting your own research horizons within the school's space-time framework actually determines a wrong subject boundary for yourself, so you can only vaguely regard a large number of educational phenomena like the so-called "education in a broad sense" and vaguely exclude them from your own Outside the main research horizons. The following statement is inconsistent with the text. ['Educational activities are widespread in all areas of human life.', 'Learning behaviors that are not taught can also be included in educational activities.', 'Current pedagogical studies misjudge the boundaries of disciplines.', 'The emergence of modern schools has limited the research horizon of pedagogy.']