Question about Head of House

[Gary Sapp & Karen J.S.]

No: HPFGUIDX 53422

Does anyone remember the Head of Ravenclaw being discussed?  I
remember Sprout being identified as Hufflepuff head of house and of
course we know about McGonagall and Snape.

I can't remember it showing up in the books.  I did a search of the
lexicon and it appeared in an online chat with JKR by Barnes and Noble.
She said Flitwick is the head of Ravenclaw.

Anyone remember reading this?

Thanks
Karen