Usmiech zebiczny (1957) aka Toothful Smile
Morderstwo (1957) aka A Murderer
Rozbijemy zabawe... (1957) aka Break Up the Dance
"According to Roman Polanski's autobiography, the film was a stunt which nearly got him thrown out of Lodz film school; Polanski had organized a group of real thugs to break up the school dance and as a result some students were actually beaten up." It all seems staged to me though.
Lampa (1959) aka The Lamp