Detention time!

Dear diary,

It was my last day of school in year nine. Me and and my friends Sam and Ellie never handed in our homework because we didn't do it so the teachers gave us three a hard time. Detention.

During lunch me and my two friends got sent to the room where you had to do work you missed so as we stepped in with homework in our hands. The teacher sat us down seperately and walked out of the room. We started working and suddenly the door shut with a bang. There was silence for ten seconds the door opened again but none of the teachers opened it ................... What was happening?