請幫我改改以下一篇英文作文既錯處,thank so much!

In the recent years, it is popular that students attend a tutorial centre
crash course for achieving good results in exams, including school exams and public exams. However, I don't agree with it. Since our personal effort is the most important, a tutorial centre just assists you a little part of all.

Firstly, students need not attend a tutorial centre crash course
fundamentally. It is because students will study scholarship, knowledge and technique from school if they listen to teachers seriously.
In addition, some students don' t pay attention to lessons in school. They told me that they didn't worry as they had joined a tutorial centre crash course. I think that is not right because they waste times of studying in school and spend unnecessary money.

Secondly, a education system of a tutorial centre is sometimes used video as self-study of students. When students have any problems, they can't ask for any questions. It is because there are not teachers. Oppositely, students can consult teacher about anythings at school. Teacher must reply students seriously.

Finally, the best way to achieve good results in the HKCEE is to injectmore times and puts effort into homework and exam. Students
can do the past papers of HKCEE. So, attending a tutorial centre is not the best way to achieve good results in the exams.

Hope that I can help you~