By taking courses, I have learned topic A. Through self-studying and discussion with others, I have explored topic B.
- I also study topic A outside the classroom. What I want to emphasis is that topic B is not in my curriculum, but I study it on my own.
- Extracurricular activities can include both activities contributed to academic study although outside the normal curriculum, but also activities not contributed to academic study such as sports, volunteer work, etc. I want to emphasis the former activities.
- Do you say "outside classes", when mentioning study by yourself,
Outside classes, I have explored B.