During secondary school (5th to 10th grade), the language programme intensifies; in addition to English, the students study French, Korean, or Latin.

In the higher secondary school (11th and 12th grade), students are prepared to take the German International Abitur exam.

Above and beyond the lessons that correspond to the curriculum, intensive promotion in subject-specific areas is taking place at the DSSI with regards to special talents and interests or also in overcoming deficiencies.

The DSSI also co-operates with both an English- and a French-speaking school in Seoul to facilitate students' progress in the obligatory language lessons.

[3] Students obtain, as the highest degree, the German International Abitur (DIAP) after graduating from 12th grade.