Duborg-Skolen is a Danish gymnasium located in Flensburg, Germany. It is one of a number of schools operated by members of the Danish minority of Southern Schleswig, and it is the leading school for this community. The school teaches both Danish and German on a native-speaker level. All other topics are instructed in Danish.Duborg-Skolen was established in 1924 as a Danish realskole and in 1958 it was recognized as a gymnasium. The curriculum enables its students to continue education in both Germany and Denmark.