How many movies have Klaus Werner and Peter Kranz collaborated on?

They have worked on 3 movies together! Their first movie together was Schoolgirls Growing Up (1972) while their highest rated movie together was Schoolgirl Report Part 5: What All Parents Should Know (1973). They have not worked together since Schoolgirl Report Part 5: What All Parents Should Know (1973). They are most known for their drama films together.