I agree with the opinion that teachers should always be kind and nice to students.
[Body 1]
TS: Scolding from teacher makes students depressed.
SS: Making students depressed will disrupt students to concentrate on studying.
AE: For example, when I was in math class, my friend who was used to do all assignments was sick so that he could not finish homework. My teacher did not believe he was sick, so she scolded him. Since he was depressed, he did not want to do assignments after that day. It lead him to fail the exam.
CS: Therefore, teachers should always be kind and nice to students.
[Body 2]
TS: Scolding does not change students' attitude immediately.
SS: Attitude is the most important part of studying. Good attitude helps student to improve their grades.