constructivist education style, scheme-oriented education, education of mathematics, behavior patterns, teaching preparation, evaluation

Our undergoing research in action started half a year ago and focuses on pupils as well as teachers. The proposed article focuses on the teacher (author), whose main goal is to transform from transmissive education style to a constructivist one - specifically, the scheme-oriented education. The experiment took place during a mathematics teaching club attended by 5 to 10 pupils aged 11-13. The curriculum focused on combinatorics. The discoveries of the analysis were divided into three interconnected categories: 1) teacher activities in preparing the class scenario and after the class, reflecting; 2) teacher activities during the class, when it is necessary to react to a situation, especially if it is not expected; 3) teacher ability to diagnose pupils, uncover the causes of their behavior. The research confirms that the transformation from transmissive education style to a constructivist one is a demanding and long-term process.