I'd actually take pride in even being able to hack it.
Even more if the result is no school for a week.
Oh good for you, you 'hacked' possibly the most easy thing in the world. It can't even be considered hacking, just hearing the administrator password between the conversation of two teachers and boom, you have full control of the entire school network.
Creating a simple password gen on a flash drive would take 5 minutes and again, boom you're in.
The only thing you succeeded in were making peoples' jobs harder, loving with other student's work, and getting yourself in trouble.
About the suspension thing, have fun explaining to college that you're the one that deserves the scholarship even though you got suspended for a week because you hacked the schools computer system.