The first time student teach

The head teacher came into our class and told all of us that our teacher was sick.
"there fore , I am going to choose a student that study hard to teach the class today ". To my surprise he chose me ! so , I went up to the white board and I was very nervous and shy but they say all is your classmate you don't shy . when I was teaching the head teacher came he was very happy that saw student can teach . The head teacher tell me you can teach you will brave .