Just kidding. Teachers used to almost all be male until public schooling and the resultant budgeting turned them female (to pay them less.) It's like reverse computer-programming where the profession turned male when they started paying more.
Pay them and they won't leave. Pay them a lot, and dudes will start writing essays about how the reason women aren't being hired and are leaving the profession is because they naturally have less of an interest and aptitude for nursing than males.