AtS/BtVS & Harry Potter x-over?

[alexissteele.livejournal.com]

I'm hoping someone can help me find a fic. It's a Buffy/Angel & Harry Potter x-over where the Scoobies and Fang Gang are hired at Hogwarts as teachers. I know there's a couple of different ones out there, but the one scene I remember standing out in this particular one is Wesley and Xander co-teaching Muggle Studies and dividing the class up between those who have experience in the Muggle World and those who have only lived in the Wizarding World, and teaching the class that's been involved with the Muggle World about the Wizarding World and vice-versa.

Any help would be greatly appreciated