What kind of jobs do Harvard students get (While still in school?)

In terms of academic jobs, the two that come to mind quickly are: Lab research: I've been paid ~$9/hr, though this could vary depending on your funding sources. Prosperous labs might pay more, but $9 is the standard wage stipend from the Harvard College Research Program (HCRP), which funds the majority of student research. Your responsibilities can vary greatly from lab to lab, from driving your own independent project to performing menial laboratory tasks. Teaching: when I was a course assistant for the physics department, I was paid $16.25/hr, though I was CA-ing a lab component, which I believe is a slightly higher than the vanilla CA rate. Calculus CAs for the math department are paid on average $2800 a term for 15-20 hours/week, which comes out to about $13-14/hr. Your responsibilities as a CA are usually some subset of grading, teaching section (giving a lecture) and running problem sessions. For students interested in jobs that will enrich their academic experiences during the school year, these are both great options: of course there are also dozens of less academic (but often higher-paying!) opportunities out there.

When I went to undergrad (1990-1994), I made money the following ways: 1.  I ran the Cabot House Grill for a term.  Back then we bought the rights to the grill for a semester and then kept whatever profits we had after costs and expenses.  I think we were subsidized though (we certainly got food for cheap since we were buying from the same suppliers as the cafeteria). 2. I worked as a research assistant for various history professors (David Donald and William Gienapp).   I was paid like $8 an hour I think.  It was really fun work -- mostly reading old  civil war newspapers and photocopying relevant articles and summarizing them. 3.  I did psychological experiments.  There used to be little tear off sheets on the bulletin boards and you could tear them off and call in and you'd go in and do little quizzes or play games and then they'd give you some cash. I think people who did things through the more business focused activities made real money, but what I did was fun and good for pocket money.

I earned money three ways freshman year: Dorm Crew, or cleaning toilets. Dorm Crew runs the entire school year and has additional opportunities for freshman in the week before their orientation and for all students in the month following the spring semester. During the term, I worked 2-3.5 hours a week cleaning student bathrooms (toilet/sink/shower/floor/mirrors). The pay starts out at $12.25/hr and scales for each full semester you work. As awful as it sounds, I found cleaning to be a nice break from academic work. The hours were also extremely flexible, with a minimum of only 2 hours/week. Consistent workers can get an opportunity to rise into management, where pay is $15+/hour. Psych Studies, as a human subject. Stephen mentioned studies in his answer, and they're still around. These days you can sign up for the online https://husp.sona-systems.com/Default.aspx?ReturnUrl=%2F and pick studies based on the time they run or on your own interest. The https://harvarddecisionlab.sona-systems.com/student_new_user.aspx also runs several well-paying studies. Base rate is $10/hr with some more lucrative opportunities here and there. The 'work' really varies, from watching videos to performing physical tasks to filling out questionnaires. Freelance Work outside college, making educational content for high school debate. I didn't pursue this opportunity as much because there was a pretty big time investment , but I created and presented a webinar based on some of my experience in debate. I applied for but didn't get a post at the Harvard Writing Center, a peer-advising group that helps students with essays or writing projects. That job paid $12/hour and would have required a commitment of 4 hours/week. The work is a split between hour-long consulting meetings and open office-hours style sessions. Many students work in the libraries (where I think base pay is $10/hr?) and are able to do their problem sets, reading, or other work in their downtime. Long story short, I'd say the best jobs early on are those with flexible hours, since they're much easier to mix with other college commitments. As a sophomore though, I'm starting to look at jobs for the skills I can develop while doing them, and I think the transition is a common one.