Harry, Snape and Dementors WAS: Re: CHAPTER Chamber of Secrets Chapter 18:

[willsonteam]

No: HPFGUIDX 189362


> 
> Alla:
> 
> Sure, we do not know what mark Harry was given at the end, I however explained upthread why I believe that he got a low mark, I think otherwise he would most definitely commented on it. Unless you go with Pippin's reasoning that Harry would not have care to comment (as if it is so normal for Harry to get a good grade from Snape lol) on it. I do not buy it. IMO of course.

Potioncat:
Let me re-phrase. I think Harry probably got a low mark--just what expected. Not a higher or lower mark than he expected and not any extra snide comment in red on the margin of the paper. 

It's very likely Snape already knows that Harry can cast a Patronus--well yes, he's seen it. I'm not sure if it ever comes up that quite a few Hogwarts students can cast one.

I still think Snape had some valid reasons for not teaching it. I also know, from JKR's comments that no one else--not even Lupin--taught it at Hogwarts.