Escape Plan

One day I was sitting beside my ex best friend in Science class and trust me on this, I DID NOT CHOOSE TO SIT HERE. The awkward silence between Sarah and I is just too unbearable. I was doing my periodic table assignment, my teacher Mr. Burns(Who is a robot that has no emotion) assigned because he hates everyone in this school. He expects us to pass in a 10 page perfected essay about our favorite element in, in 2 weeks. It takes me a week just to write one perfect one paged essay, how does he expect me to write a ten paged one in two weeks.
"THIS IS RETARDED!" I yell at Mr. Burns.
"Well then fail f-" He got cut off by some loud noise being made from outside in the hall.
"EVERYONE CALM DOWN!" He starts yelling but no one listens to him. They just continue screaming like a bunch of maniacs. I get out of my seat, walk over to the bookshelf on the side of the room. I pick up sevenish textbooks and SLAM! Well that got everyone's attention. I think.
"LISTEN UP ALL YOU LITTLE SHITS!" I scream. Everyone stares at me shocked. "Calm down and get back to w-" BANG! I get cut off by an even louder sound then before. It sounded like a rocket launcher bombing the school. I swear about 95% of the class screamed. The other five percent being the teacher who was mumbling something about aliens invading the school and me who was too excited and curious to scream. Finally someway out of this prison cell forever.
BANG BANG BANG!
"EVERYONE COME OUT WITH YOUR HANDS UP!" Says a voice on the other side of the door.
I'm so screwed.

Hey I'm Rayne Storm. My school was just invaded by crazy people and I'm stuck in school with my ex friend Sarah trying to come up with an escape plan for how to get out of here without dying. As far as I know we may be the only students who are alive in here. I need to protect her at all costs. Even if, the cost is my death.