How much do university students earn normally during school term? How common is it for students to be working while studying full time?

Temp hour rates about between $10 to $12???.

While working while in college lengthens the time it takes to get a degree and may cause learning difficulties, work experience can also lead to better job prospects and higher pay after graduation. This study looks at the impact that college graduates' job choices have on their success in the labor market. A specific panel data set of university students in Finland serves as the study's foundation. The data set spans the years 1987–1998—a time when the Finnish labor market saw substantial changes.
According to the study, job experience gained while still in school boosts graduates' starting salaries, but after the selection bias in work experience acquisition is taken into account, there are no longer any statistically significant benefits on employment or wages.

It is not uncommon, and prob $300 is possible

If they work part-time employment, university students usually make between $10 and $20 per hour, depending on the position and the area. Many students work to support themselves or get experience while enrolled in full-time courses. Students frequently juggle employment and school, taking up positions in retail, hospitality, tutoring, and internships. While maintaining good grades while working can be difficult, this balancing act helps people manage finances and develop skills.