There are framework curricula in every federal state, where the aims are set. Every school is responsible to carry out the curricula and to establish its own concept to do so.
The education plans for general education schools in Baden-Wuerttemberg can be found at:
http://www.schule-bw.de/faecher-und-schularten
The education plans for vocational schools in Baden-Wuerttemberg can be found at: https://www.ls-bw.de/,Lde/Startseite/Bildungsplaene/Berufliche+Schulen