The Worst Witch (1986)

Mildred Hubble (Fairuza Balk) is one of the young girls at a prestigious witch academy. She can't seem to do anything right and is picked on by classmates and teachers. The headmistress of the school, Miss Cackle (Charlotte Rae), has an evil twin sister (Agatha) who plans to destroy the school. Can Mildred foil the plan before the Grand Wizard (Tim Curry) comes to the Academy for the Halloween celebration you'll never forget?