It takes a lot of practice, but you can give the appearance of being academically oriented while maintaining Nursing as your priority. Try to appreciate the fact that you will always be misunderstood by people whether you work in a school, hospital (HELLO!...can you say "handmaiden"), MD office, etc... It can bring you down, but only if you let it! Keep a positive attitude, smile, celebrate your successes (including the small ones), and order flowers for yourself to celebrate Nurse's Day if you didn't receive any from your PTA or administration.
I agree that we have to advocate for ourselves. Don't just sit in that little closet that they call the Nurse's Office. If that means killing yourself to plan a Health Fair or getting the school community involved in a fundraiser for defibrillators and mass CPR training, than do it! You have to show them how invaluable you are.
The teachers and staff that I work with at school have become better friends to me than the nurses that I used to work with in the ER. They know how much I do! They marvel at how many hats I wear during the school day - nurse, educator, mom, seamstress, eyeglass repairer, braces fixer, mental health resource, friend, secretary, food supplier, custodian, spy, nutrition resource, confidant, medical dictionary, time-out room, and the list goes on...
By being positive, you feel better about yourself and others feel better about you! That makes it easier to be the only medical professional in a world of educators.
It's up to us to change the old stereotype of "band-aid pusher". That may be the reputation that the nurse before you had. Old stereotypes of nurses in every field are being changed, and we need to work on that as well.