How the teachers teach and how the professors teach?

Teachers are not as much smarter as professors. Professors know more than teachers and in the word "professor" there is a word "pro" in it which means professional. So, the teachers teach mathematics for the most. But unless they are trained. They only know one subject per class. Such as moving classes in middle school, high school, and collage. You are moving to different subjects, different teachers, different lessons. And a professor teaches more than one subject. They teach: Science, mathematics, art, social studies, and many other than one teacher.