Can I put a Class as an Activity?

I am one of 3 senior tutors in a class full of freshmen. These students learn about how to succeed at school and college preparation, and we are there to serve as role models, answer their questions about high school, and assist with challenging school work.
I was unsure if this would count as an “activity” under that segment of the common app, since I technically do this during the school day.

If you are working as a tutor, it’s an activity. When you are doing said activity doesn’t matter.

Unless it appears on your transcript as a class for credit, and all/most of your time on this occurs during school hours; then it’s a class.

I was not necessarily working. I have a class period in school where I am called a tutor and assist the teacher.