There are three major educational paths that can be followed to become a Registered Nurse. A student must successfully complete one of these degree programs to be eligible for the NCLEX-RN licensing examination. Once a student passes this exam they are able to practice as a Registered Nurse (RN).
In the ongoing TV series Smallville, Clark Kent (Tom Welling) is initially portrayed as being a shy teenager who is very unsure of himself. At the start of the series he is unaware of his origins or of any future powers he will develop.
Clark Kent is the person, Superman the identity: With John Byrne's more assertive revamp of Clark Kent as well as Superman's greater grounding in Earth culture and humanity (as opposed to the everpresent Kryptonian heritage of the Pre-Crisis version), Superman is considered the mask and Clark the person.