Who's in charge???

I have taught nursing and have been involved in making arrangements for student clinical sites and preceptorships. It is a mutual negotiation between the school and the hospital/facility -- first of all, a hospital or other facility has to be approved by the state BON for use as a clinical site, which is a process that takes some time (in my state, at least; BON people have to come do a site visit, and they have to fit that in amongst all the other things they have to do ...). Once that hurdle is cleared, the contact/lead person from the school sits down with representatives from the hospital (nursing administration or education dept. people) and you ask for what you want and the hospital tells you what they are willing to offer you. Hospitals (and other facilities) vary greatly in how flexible they're willing to be, and there are lots of variables to consider, including what other schools (if any) are also using the facility as a clinical site and what areas/units will provide the best educational experiences for the students. In my experience, the facilities have not gotten involved at all in deciding which individual student goes where when; we have just worked out "slots" and it was entirely up to the school which students went where.

Just as an aside, as an instructor, I would consider it a bad idea for a student to be doing clinicals on the same unit s/he works as a tech. It would be much too easy for you to slide back into the role you're familiar with (just human nature :) ), and it would also be difficult for other staff on the unit to relate to you being in a new/different role (ditto). Much smarter and "healthier" (for everyone involved) to place you in a new, "fresh" setting.

Plus, the wider variety of experiences and settings you get in school, the better! Best wishes.