I was a good student, but I didn't like school.

I was a good student, but I was the biggest procrastinator.

So you weren't a good student.

When I was in high school, I was a bad kid and a good student.

I wasn't a very good student. I prefer to learn by experience.

I was 16 and did a play at school. I was a rather good student... And then I did a play when I was 16 and completely lost all my concentration for academics.