We basically start from the systematic - theoretical didactics that applies the methods and procedures of system
theory, especially systematic thinking in order to solve problems in a scientific, technical and ideological field. Due
to the fact that the purpose of the system theory is to analyze complex systems and prepare technical measures for
their effective action, teaching biology here is regarded as a complex system consisting of a series of complex
teaching situations. One of the objectives of this research is to discover the elements of teaching situations, then to
detect the relations between them, to investigate the criteria under which they act and to lead them to raising the
level of students’ success. For system - theoretical didactics it does not matter which method will be applied, but the