As a school subject at grammar schools throughout Baden-Württemberg, computer science is undergoing a rapid development: from the introductory basic course “Media Education” in grade 5 to a compulsory advanced course “Computer Science” in grade 7 to the design of a new profile subject “Computer Science, Mathematics, Physics” (IMP), which can be chosen as an alternative to the already existing profile subject “Science and Technology” (NwT) - in future, teachers with the appropriate qualifications will be needed everywhere.
If you wish to pursue a teaching degree in computer science, you should select the so-called "polyvalent double major bachelor’s degree program with a teaching education option". That means you will study computer science and a second subject simultaneously and can then decide whether:

You wish to become a teacher, in which case you would have additional modules in didactics (in computer science and a second subject) and educational sciences; or
You decide that teaching is not for you. Then you have the option to hone your skills individually in both subjects.