The Comparison Between Times of Middle School and University Days

As we know, there are so many differences between times of middle school and university days that I cannot list all of their different aspects.

First of all, middle school students always study under the supervision of their teachers so that they don't need to think deeply on how to study by themselves. What they should do is only to recite as many things as they can so as to get a high mark. On the contrary, students should pay more attention to autonomic learning. Because university teachers often teach you general knowledge and if you want to study in greater depth, you must study consciously or read more books to expand your horizons.

Here you say two contradictory things.

On the other hand, the gap of life style between times of middle school and university days is also big. Middle school students always complain about their homework. Too much homework has limited the time to exercise and relax. As a result, they seldom have time to concentrate on extracurricular activities. From my point of view, university students have plenty of time to take part in all kinds of activities for the reason that they have a relatively free environment. What's more, university students have more opportunities to express themselves which middle school students don't have.

Despite their apparent differences, the times of middle school and university days have something in common. In order to be successful, they all need to strive for goals.

This is very well written with few errors. Your English is pretty advanced. Good job!