You're a new student at this school..

You entered your new school, opening your locker. Then, suddenly Zip and Oliver disturb you by messing your books. Then Mrs. Circle came to them, advised them with quite a gloomy gaze... and she said to all the students

"Everyone! come to class and we will study math again today~ or.."

She shows her left hand... which was made of a pencil and a needle pen. All the students nodded in agreement, you could see they're scared including you..