McGonagall's Teaching Experience

[potioncat]

No: HPFGUIDX 129255

Amiable Dorsai wrote: 
> What did you do during the war, Minnie?  What did you do for 11 more
> years before you started teaching?  And what did you teach before
> Dumbledore gave up the Transfiguration post?
> 
Potioncat:
Well, something must have happened mid-year, causing an opening for a 
teacher at Hogwarts. And JKR wanted us to know that McG started mid-
year. But look at what we don't know:
What did she teach when she first started?
Was DD at Hogwarts? He could have left Hogwarts to work with Flamel. 
For that matter, DD may have left Hogwarts and she was his replacement.
And, later, did McG become Deputy when DD became Headmaster, or was 
someone else in that spot? DD did not have to be on staff to become 
Headmaster. Healer Derwent was at St. Mungo's before she was 
Headmistress.
So many questions about McGonagall!