A Bad Spell for the Worst Witch

A Bad Spell for the Worst Witch by Jill Murphy
 
 Mildred Hubble is back for her second year at Miss Cackle’s Academy for Witches, and she is more determined than ever to lose her reputation as the "worst witch". However, her good intentions are quickly tested when she realizes the formidable Miss Hardbroom is her form teacher once again. Between clashing with her rival Ethel Hallow—who vengefully turns her into a frog—and trying to keep her hopeless tabby cat on her broomstick, Mildred's term is off to a disastrously funny start.