Surprisingly, it isn't:
Homeschool Teacher Qualifications. But still, just what were Maggie's qualifications? And shouldn't a family with the prestige of the Collinses have gotten the best person qualified for the job? If that was Maggie, the pickings must have been awfully slim in Collinsport.
But then, we know why in reality the choice was Maggie - because she was a character who was already on the show, so DC didn't have to hire another actress as the new governess - particularly considering how that didn't exactly work out too well with Betsy Durkin.