School Days (sometimes spelled Schooldays[1][2]) is a 1920 American silent comedy film, produced by the Vitagraph Company of America.
She passes him a note on a slate stating "I love you Joe" while the grumpy and angry teacher is busy scolding one of the other children.
Yet another schoolboy takes the opportunity while the teacher is dazed to dip his chewing gum in ink and fire it towards Joe with a slingshot.
More chaos ensues and things are complicated further when four inspectors arrive at the school, and accidentally sit down on sharpened objects (placed on the chairs by a schoolboy but meant for some of the girls).
The Film Daily gave it a positive review in May 1920, writing among other things: "What makes this a satisfactory offering of its type is the fact that there are several novel bits and that it has been produced on a lavish scale", but also noting that "Some of the riotous material could be cut to advantage, but, generally, this will hold on its own.