This app shows you the representation plan of SGL. You can it to class or to filter for courses. If you have representation, it is possible this in writing with intelligence (e.g. Whatsapp) forward them.

This app has been completely in material design (http://www.google.com/design/spec/material-design/introduction.html) develops and is open source available under https://github.com/randombyte-developer/SGLVertretungsplan

Since I am not a student of SGL's more even, I offer no support for the app. If someone finds that wants to take on this project, then he should please contact me at apps.randombyte (at) gmail.com.