Hi there!
Just a couple of points from a teacher's perspective:
Some people believe that university students should be required to attend classes. Others believe that going to classes should be optional for students. Which point of view do you agree with? Use specific reasons and details to explain your answer.
In my opinion, university students should be required to attend classes regularly rather than optionally. There may be a possibility that a student can do well even though he or she didn’t attend the classes regularly. However, Tthere are many advantages in attending the classes regularly.
You're showing contrasting information here, so it creates a more natural flow by introducing the sentence with "however".
The Ffirst reason is, that by attending classes regularly, he can obtain knowledge from a teacher who can gain (? - the teacher can gain knowledge?) valuable knowledge. This knowledge will help him keeping with the latest information and syllabus, so that it will be easier for him to gain a good score in the final exam. But, if a student is attending classes according to his will or once in a while the subjects may not be clear to him and he may not attain good knowledge and most (would be more) likely to score low marks.
Be careful about gender identification. Recently it is considered more appropriate to leave the subject "gender-neutral" You might consider changing it with "The student / they / them" etc.
The second reason is when attending classes regularly one can know his standards by which he can improve himself towards excelling in his academic performance. He is pore (spelling - more?) focused on the subject. On the other hand a student attending the (unnecessary) classes optionally can easily get distracted by the environment and spoiled (tense) his academic performance.
Finally, university students should attend classes regularly to gain proper knowledge and gain confidence to excel in final exams rather attending class optionally.
Even though this serves as a conclusion, it's a little hard to tell if it is introducing a new point. I prefer a very clear conclusion - "For reasons A, B, and C, I believe that students should be required to attend class."
I hope that helps you out a little bit!