Oh for gosh sakes! I forgot to mention that I read Wynne-Jones' "The Pinhoe Egg". So, of course, only a few of you are going to get the oh-so-humorous reference to it in my last post.
"The Pinhoe Egg" is a Chrestomanci novel starring Cat Chant from "The Charmed Life' and introducing Marianne and Joe Pinhoe, two dwimmer magical kids from a nearby village. Marianne gives Cat an egg that she finds in her Gammar's attic after her Gammar goes "senile" and that egg helps to unleash all kinds of previously imprisoned magic.
At the end of the book there are six children involved with the Castle, Julia and Roger, Chrestomanci's children, Janet, stranded by the awful Gwendolyn in "Charmed Life", Cat, Gwendolyn's brother and the future Chrestomanci, and now Marianne and Joe Pinhoe. It's not exactly a school but this set up leaves the door open for some very cool magical adventures. Cool. Well, my lightbulbs are waiting.