The paper presents a part of ongoing research. The research focuses on student portfolios at various levels.
These levels are assessment of professional knowledge, professional skills and the process of personal development of the future teacher. The motivation for this effort is ongoing changes at schools, in approaches to teaching, in approaches to pupils and also our need to contribute to the improvement of mathematics education.
We will present here a ested tool for analysis of research data, especially portfolios and interviews. The results of the research will be compared with similar foreign research.
In the conclusion we also propose possible ways for further work and research.