Questions about LPNs

To practice in any particular state and LPN must hold a license with that state's board of nursing. Every state has their own board of nursing and in California and Texas the title is called Licensed Vocational Nurse, or LVN. I suppose one could hold licenses in as many states as he/she wanted. Some states have "compact licenses", where they accept licenses from other particular states. If that's not the case then you must apply for licensure to the state and have your original license endorsed, meaning you do not need to sit for the state licensing exam more than once. For instance I received my original license in Texas and when I moved to Washington state I just applied and paid my fees and I received a Washington license. I still hold my Texas license.

PRN means "per diem" or "as needed". In the context of staffing, a nurse that works PRN does not have a regular schedule. They sign up to work any available shifts not filled by regular staff. Usually PRN staff do not receive benefits and have a 15% greater pay than a regular nurse's salary. They usually have much more flexibility in their scheduling.