Shangcai has a work-study center, where the marketing department and the tutor department can provide part-time jobs and tutors. It is safer and more convenient to safeguard students' rights and interests than to find them by themselves. How much money can be earned by part-time jobs and tutoring is uncertain. For example, the tuition fees of primary school students and middle school students are different ... but my classmate seems to make a lot of money as a tutor, earning nearly 100 yuan a week. Students, have ambition, come on!