I'm currently a high school junior (11th grade) and i am looking into the nursing field. I have a very very vague understanding on nursing. I understand about the different levels such as LPN and RN and such. I woud like to look into becomming an RN then specializing from there down the road.One of my questions is what are the different levels of nursing and are you required to advance through all of them to reach an RN?Also, are there any prerequisites for becomming an RN??