Marecek, Pass Me the Pen!

Kroupa sr. (Jiří Sovák) is a factory master who has to start evening classes, and the school he is sent to is the same one his son attends. Kroupa jr. (Jiří Schmitzer) ends up teaching his own father math and physics, while Kroupa sr. learns that a student's life is harder than he assumed. Oldřich Lipský plays it as a plain family comedy, and its lines passed into everyday Czech.