EN
In the paper we present the statistical methods for evaluation of the teaching process. We use several, well known preference aggregation methods, in particular Dodgson ranking and cluster analysis. Our research is based on subjective, international rankings which had been published by Shanghai Jiao Tong University and The Times. In the major part of our research we use the first one, Academic Ranking of World Universities. The second ranking, The QS World Universities coming from The Times, is a supplement of the analysis. In this work we discuss a rank of Polish universities changing in time.