There is a saying :"If a doctor, lawyer, or dentist had 40 people in his office at one time, all of whom had different needs, and some of whom didn't want to be there and were causing trouble, and the doctor, lawyer, or dentist, without assistance, had to treat them all with professional excellence for nine months, then he might have some conception of the classroom teacher's job". Really, to my mind, teacher's job is extremely hard. It demands you to be strict but not too much, kind, but not too much. I think it's so difficult to combine such treats in one person. But at the same time every person, as a rule, thinks that it's easy. And only if you try it by yourself, you'll understand.