The Initiation of Sarah (1978) Nutty house-mom encourages timid telekinetic teen to use her powers against their sorority's snooty rivals. It's the Omega-Mus crossed with The Craft. TIL: Probably best to avoid your school's Greek life if satanic rituals are part of pledge week.
Your daily dose of culture courtesy of Army of Darkness (1992) - "You will never be completely free from life's little annoyances, but you can become free from feeling annoyed." - Richard Carlson