By adding actors and more action
Mature or adult would be your answer.
Personally, I would phrase it like this:
The choir moved the audience to tears with their beautiful voices.
No a teacher cannot be subordinate to his students.
Explanation:
In a school a teacher and a student should have a cordial relationship. A student should respect a teacher and a teacher should respect a student. A teacher is the head of the class as he has come to share knowledge with the students as well as a teacher will help in developing the critical thinking skills in students.
A teacher has the power of marks in his hands and should exercise his power properly. In the same way it is the duty of the students to follow the instructions of the teachers properly and pay attention in the class , so that other students are not disturbed.