Advanced physics

[homeschoolmom1]

My child is interested in teaching physics in Germany. In order to do that, his Bachelor´s degree (which can be in any field) has to include at least 18 credits in physics. I have come across the following: AP physics, SL physics 1 with lab, study.com natural science (transfers as physics at TESU), BYU physics 1 and 2 (Algebra or calculus based), Saylor physics 1 and 2, UExcel physics. I am not sure if the DSST astronomy would count as physics, too. I presume that some of these duplicate. The courses cannot be from community colleges. Does anyone know of any more advanced physics courses (quantum mechanics, astrophysics, relativity etc) that don´t duplicate those courses, are not from community colleges and can be taken online? I suppose they could be at the graduate level.