Road to Avonlea (1990)

Season 5: Episode 4

Davey Keith is already in trouble after the first day of school. After getting caught fighting in the playground, Clive Pettibone assigns him one hundred lines to write as punishment. While this might be difficult enough under any circumstances, for Davey it is doubly severe because he cannot read or write. After he inadvertently lands Sarah in trouble she learns his awful secret. With her help, however, he begins to learn how to read.