My school only had TA opportunities in the summer between M1/M2 for physiology and anatomy for the PA students. It was a source of income for over the summer.
The other options that were available included tutoring (paid or volunteering), Step 1 study group leader (volunteer), and M2 cardiovascular group leader (volunteer). Some of my classmates taught for Kaplan or Princeton Review.
Your school will likely have some option for you to continue teaching, if you want to pursue it. Compensation is likely going to be minimal.