Duden has the answer

The DUDEN Paetec publisher of schoolbooks is the epitome of good German and sophisticated learning materials. With its editorial offices in Berlin and Frankfurt am Main, the publisher develops textbooks and complete study courses for almost all important subjects – from primary school through to the school leaving exam.

This includes groups of formulas and tables, reference works, special teacher materials, workbooks as well as revision and exercise materials. The publishing company has particular expertise in the integration of modern electronic media in study courses and entire learning environments.

The conceptual design and layout for diverse schoolbook catalogs as well as qualified direct mailing campaigns come from us.