Activities

For my common app activity,
Can I use the experience of giving private tutor at math as one of my activities?
I saw work(paid) category, and I consider private tutor as a work, so I thought it would be a good work experience.
Or do the college people only expect to have a formal employee only?

Absolutely fine. Would add some details of how many students, what grade level in the description.

Agree, that is fine to use.

Thank YOu