http://www.asianfanfics.com/story/view/381078
I don't know about you...but I loved this one! It's not completed...but I really liked it!

Diaries of a broken family kaisoo
Breaking through circles hunhan
Closer to you hunhan
Crystal dawn exo
P/S I love You hunhan
Hello its me hunhan
Protection hunhan krishan
Snowdrop hunhan,kailu,layhan,xiuhan
The letters baekyeol

Sorry im forget the rest of my subs stories :-(

Here are some:

First love,high school and other disasters by Teatime Taemint
I Dont Like Kim Jongin - DOMOrawrSauce
The competition - EXOtic-fangfirl
Those Unspoken Words - CloudieSky27
That Good Looking Jerk - sekai-chan
What Separates me from you - witchhazel
A Season With you - minhosims
welcome to SM boys high - Kuma-rin
All for you - _WhiteLilac
The going home club - mennga
The lovely Silence - Sakuralove
The nerd herd - Kyung Soul
Target - iloveexo23
Matchmaker Yixing - Overlord_Nim
Not Your Ordinary Junior High: Relationships With Juniors - Loner-sshi
Venus - neoncaterpillars
Love notes at my door - AlmightyUmmadebbzz
Its all a game - greyingsky
i think i wrote too much... but hopefully you will like them
but here are also some fics i think u shud read..but setting is not school -_-...
then came you
perfectly imbalanced
dark alleyways
1001 fireflies...

dats all...n no more...excuse me

Diva Central

It's epic

http://changdictator.livejournal.com/3484.html
read and sob.
then watch this.
http://www.youtube.com/watch?v=f_3kKTOBwr4

Jongkey: http://www.asianfanfics.com/story/view/66705/making-an-exception-2min-highschool-jongkey-onew-shinee/18
2min: http://www.asianfanfics.com/story/view/101632/breaking-innocence-2min-s-story-2min-jonghyun-key-minho-taemin/18
Exo pairings: http://www.asianfanfics.com/story/view/197058/not-your-ordinary-junior-high-relationships-with-juniors-hunhan-taoris-baekyeol-kaisoo-layhan-sulay-juniorhighschool

these are the only ones i can think of as of now. hopefully you haven't read them all and enjoy?

O_O Have you read Borami's High School Romance?