In high school, the teacher basically babysits the students. The teacher must always ask students to pay attention in class, do their work and stay awake during class. Even high school teachers don't expect their students to read their textbooks ahead of time. At university the professors are very different. College professors expect the best from their students, because they know that their students spend large sums of money on their education. Professors expect students to read textbooks before class and do homework. They also expect their students to stay awake during class, otherwise they will kick him out. College professors don't care if a student doesn't turn in his homework or forgets to read a chapter in the textbook. University professors don't worry about this because it's not their grade, they already have a degree. Additionally, college professors will not accept any late work. They are also very strict about absences, and most college professors rarely give extra credit to replace a student's absences. This is one reason why high school teachers and professors are not