- Stift Neuzelle
- Landheim Ammersee
- InFluent
- Odenwald, DID Deutsch-Institut
- Sprachcaffe Languages Plus
- Alpha Aktiv Language Academy
- German language school
- Stiftung Louisenlund
- EURASIA Institute Berlin
- Gymnasium Lindenberg
- HPC International School Heidelberg
- Schloss-Schule Kirchberg
- Hermann-Lietz-Schule Schloss Bieberstein
- GLS Berlin Westend
- German Language School, Spitzingsee
- German Language School, Munich
- German Language School, Josefstal
- Carl Duisberg
- GLS Berlin Splash
- GLS Berlin Villa
- OISE Heidelberg
- Berlin College, GLS Berlin
- Schule Schloss Salem Summer School
- St. George's School Cologne, The British International School
- DID Deutsch-Institut, Berlin Park Residence
- Munich, DID Deutsch-Institut
- Frankfurt am Main, DID Deutsch-Institut
- Berlin - Wannsee, Alpadia Summer Camps
- Lahntal, Alpadia Summer Camps
- Berlin Brandenburg International School
- Schule Schloss Salem
- Bad Schussenried, Humboldt-Institut
- Berlin-Werbellinsee, Alpadia Summer Camps
- Freiburg, Alpadia Summer Camps
- Lindenberg, Humboldt – Institut