As the best class in First High School, the discipline of Class A had always been praised by the teachers.
They usually didn't need to stop in the middle of class to maintain Class A's discipline. Everyone listened obediently. Even if a few students weren't interested in studying and did not listen in class, they basically did not disrupt the lesson. They usually just slept or picked up their cell phones to read web novels; few people would whisper or talk during the lessons.
Today's physics class was different from usual. Few of the students in the class listened to his lecture at ease. Instead, they craned their necks and looked out of the classroom from time to time.
Their hearts weren't in the right place.
"It's Sister Nian."
"I see her."
"Sister Nian is back."