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Anonymous
Whats ur fav. school girl anime???
>> Anonymous
Haruhi, Hidamari Sketch, Azumanga Daioh, Shakugan no Shana (if that even counts) and Lucky Star
>> Anonymous
Haruhi, Hidamari Sketch, Azumanga Daioh, Sketchbook Full Colors (FUCK YEAH that counts) and Lucky Star
>> Anonymous
Mahou Sensei Negima <3 Nodoka
>> weoweo
Haruhi, Azumanga Daioh, Lucky Star N SCHOOL RUMBLE!!!!!!!
>> Anonymous
     File :-(, x)
No Gakuan Utopia Manabi Straight!?
Concur with Azumanga & Lucky Star
>> Ehhh.....
If I can assume you mean school genre anime that have girls as main characters, then...

KareKano
Ouran Hosutobu
Kodocha
Card Captor Sakura (it takes place primarily at a school...)

AzuDai was an awesome manga and a terrible anime, so I'm not sure if that one counts...