There are many teachers in schools.
Teachers teach students And teachers lead the students to be good people but if there are no teachers the students will be bad people so I think teachers must teach students To study for one self is not good way for students
First Most students can't solve hard problems by themselves so if students study alone is students cannot question hard problem so it isn't good way. Conversely if students learn from teacher students can ask questions about a hard problem to teacher so students can learn a hard problem. so I think to learn from a teacher is the best way for students
Second teachers guide students in a the right path most students want to do bad actions if students don't have teachers they will do bad actions Conversely if students have teachers teachers learn don't do bad action so they will think I must do right action So I think students learn from teachers.
In summary if students learn from teachers they can solve hard problems so the students can learn about hard problem and the students can learn about the right way so the students will not do bad actions I hope students learn from teacher so students become good people.