Boring happy day

Last week the head teacher came in to our class room and told us that our teacher was sick.
Then he said he was going to choose a student to teach the class to my surprise he choose me.
So i went up to the white board and said''Good afternoon every body!!!''.Then i taught about reading .All the student didn't listen to me . Some student played game some ,listened to music,ate candy,some was dance.I was very boring and unhappy.
One or two minute later shouted to all the student. Then i said who didn't like to study go out? .And then all the student said''sorry!!!''
Then i taught continue and no one did like this again.And after reading i had game for them played .we were very happy.Some student want to me taught again .
When my teacher come back to school he was very happy and said'' I'm good student!!!''.He want to me taught again.:)