We are actually lucky to know any German, because it didn't get taught to us at all by my grandmother. I suspect it's because she came to England so soon after the war, so it may not have looked the best to be teaching her children this former enemy's language. Instead we went to a Steiner school and learnt it there.
My daughter is at university and studying all hours now, so no longer does rhythmic. She can't afford the fees or the time.