Six Swedish Girls in a Boarding School (1979)

Miss Klein runs a boarding-school. The girls that go there are really "free spirited." They chloroform a peeping Tom, lock two plumbers in the dormitories, strip for a gamekeeper and tease their gym teacher. In class, their biology teacher gets carried away while giving a demonstration of sex positions with the gym teacher. In the meantime, one of the girls makes some exciting alterations to their bicycles to make their rides more enjoyable.