The article was prepared in connection with the 90th anniversary of Polish education in Warmia and Masuria. It shows the collections of the Museum of Warmia and Masuria in Olsztyn, related to the professional and social activity of Bronisław Chabowski (1892–1942), who in 1929–1934 worked in Polish schools in Warmia. Descriptions of documents and photographs are a pretext to present applicable legal provisions, which in the interwar period regulated the functioning of education in the Polish state as well as the education of the German minority, enabling these to be presented in a broader historical context. At the same time, they enable the fate, professional career, educational and cultural and social activities of Polish teachers to be reconstructed through the prism of individual life events. The analysis of B. Chabowski’s team also gives a picture of the typical personality of a Polish teacher who decided to work in schools founded in Warmia from 1929. In the vast majority of cases they were people with pedagogical and organisational skills, who had artistic and social passion.