Dong Nai University where has many experienced teachers taught many generations. When going to Dong Nai University, the students will see many friendly teachers and be ready to help their students study. In my opinion, I think that I was keen on spending three semesters and seeing many old teachers who taught much useful knowledge both in lessons and life. While I studied at Dong Nai University, the lectures created many good conditions for their pupils. I will show three advantages and disadvantages after three semesters I attended the in-service English major at Dong Nai University.