What can Harry teach Hermione in DA ?

[corinthum]

No: HPFGUIDX 73908

Del wondered:

> Ever since I read Hermione's idea about the DA, I kept thinking: but 
> what does Harry have to teach *you* ??? As far as I can remember,
>the 
> only thing Harry learned without Hermione around was the Patronus 
> Charm... 
> So I would understand if it said somewhere that Hermione is some
>kind 
> of co-leader of the DA, but she's described as just a normal member, 
> and that irritates me extremely : when did Harry become a better 
> student than Hermione ??? I mean, Hermione can charm those Galleons, 
> which is supposed to be NEWT level magic, but she doesn't know those 
> charms Harry knows ? Illogical...


I think the difference comes from simple use.  Hermione helped Harry
research, study, and practice spells for the Tournament, but did she
actually practice them herself?  I get the feeling that Hermione did a
lot of the research (determining which spells might be helpful in
certain situations) but didn't actually practice the spells herself. 
She was more of a coach, watching Harry practice and correcting
mistakes.  Therefore, despite the fact that she has a more complete
knowledge of the history and use of each spell, she is not as
proficient at actually using the spells as Harry.

It seems the same with the rest of the DA and some simple spells.  The
majority of the school learned Expelliarmus at the same time as Harry,
Ron, and Hermione.  However, none of them had ever really practiced
using it, and as a result weren't nearly as good at it as the trio.

-Corinth