Abstract
Chapter is devoted to methodological consideration on possibilities of research concerning relation between pupils' cognitive structures and the linguistic system of mother tongue - Czech language. Research as a whole is aimed at creating effective educational models of teaching.
It gives reasons for qualitative framework, because it is opened for preparation, reflection and changes of educational processes. From the point of view of research tasks the text considerates on such methods as interview, case study, action teacher's research and experiment of educational phenomena.