Deutsch-Uni Online (DUO) is learning management system with various languages (but mainly German) and modules (e.g. basics, study - and vocational preparation). For one module dealing with a specific issue, single pages provide materials (texts, pictures, videos) that are edited by various exercises. Usually, one module is supervised by a tutor whom certain task results are sent to. Additionally, there is an internal board and chat to communicate about the process of single tasks with other learners and the tutor. The voice-chat-offer is supported by Skype. The modules normally serve a stay abroad in the respective country.