I would say nurse because there is always a necessity for nurses,whereas teachers tend to keep their jobs and it almost seems like you have to wait for a retirement to get an opening.But in addition to that,nurses earn much more money than teachers.Like three times more.SO you would be more comfortable with more money.
nursing jobs are always available but hard to finish nursing school. Teaching jobs are harder to find but also requires tons of school. kind of depends on can you stand the sight of blood and guts without getting sick. both professions are rewarding.