The Worst Witch (1998 TV series)
The Worst Witch is a British-Canadian ITV television series about a group of young witches at a school for magic. The series stars Georgina Sherrington and Felicity Jones, and is based on "The Worst Witch" books by Jill Murphy (published from 1974 onwards). It aired for a total of 40 episodes spread over three series between 1998 and 2001, before being followed by "Weirdsister College." Most episodes revolved around the school, following the adventures of Mildred and her friends. The series was later followed by "The New Worst Witch", which ran for two series and chronicled the experiences of Mildred's younger cousin Hettie as she attended the school.
Andre Norton
She wrote more than a dozen speculative fiction series, but her longest, and longest-running project was "Witch World", which began with the novel "Witch World" in 1963. The first six novels were Ace Books paperback originals published from 1963 to 1968. From the 1970s most of the series was published in hardcover editions. From the 1980s some were written by Norton and a co-author, and others were anthologies of short fiction for which she was editor. (Witch World became a shared universe). There were dozens of books in all.