The Bald Student(1979)

Original title: Ο Φαλακρός Μαθητής

Thanasis, a family breadwinner who has been working for 17 years at the Ministry of Measure and Station without any promotion, is trying to cover his expenses by doing a second job. When he learns that he can not be promoted because he does not own a high school diploma, he decides to go back to school.