I'm a CNA - a certified nurse's assistant. That means that I'm certified by the state of Illinois to perform certain medical functions, almost all of which can best be described as 'grunt work'. In order to be a CNA, you need to be certified by your state. Some states require you to take a course (Illinois does), but others don't (Florida doesn't). The course I took was eight weeks long and was free, since I was taking it to work for my old facility.
Basically, a CNA will do whatever the nurses don't have the time or inclination to do. In a typical nursing home, this usually means helping residents with dressing, showering, eating, transfers (and most of the ones I dealt with needed full assistance for that), oral care, bathroom use (especially for incontinent residents), etc.
However, at my current job, I work for a supportive living facility, which is basically a state-funded assisted living facility. It's the same thing, it's just that the funding comes from the state, so it's a different classification. The day shift mostly does housekeeping and sometimes helps residents with showers or dressing, but most of the residents here are fairly independent. On the night shift (my shift), we're mainly here in case of emergency. We're the only staff in the building, and there's only two of us (at the moment). My coworker does med reminders (exactly how it sounds, reminding certain residents to take their meds) and the resident laundry, and I do the cleaning in public areas and the offices.
It's one of those revolving-door positions, really. I don't plan to do this forever. I'm going to be going back to school either in the fall or spring to get an Associate's Degree, and then I'm planning on moving back to Orlando and getting my Bachelor's from UCF in hospitality management.