Uchebnik.

In October, 1956, during the Hungarian revolution against communism, a small town's students burn their russian grammar books believing they'll never have to learn russian language again. After the revolution is crushed by the soviet troops, the students have to have a russian book to be not kicked out of the school. A young boy risks his life and limb to help his idol, an older boy from the school finding a book while he tries to be a friend of him.