Lots of teacher assistants function on a portion-time basis, and in most college systems, you will get your summers off. https://telegra.ph/%EC%97%AC%EC%84%B1%EC%A0%84%EC%9A%A9-%EC%95%8C%EB%B0%94-%EC%A7%81%EC%A2%85-%EC%95%88%EC%A0%84%ED%95%98%EA%B3%A0-%EB%8B%A4%EC%96%91%ED%95%9C-%EA%B8%B0%ED%9A%8C-10-25