Pressure points, vulnerability areas on human body, joint locks and "come a long holds and to always have a warrior’s mindset in case it is ever needed.
How about teaching them about self defense with firearms and firearms safety. Teach them to become a responsible gun owner and take some CC classes. Then teach them about the USCCA and tell them once they become a gun owner how this can benefit them.
Our school district a few years ago booted us out of a meeting when we proposed training for teachers. But the look on the boards faces were priceless!
Provide them with the most valid information & websites that can guide them through the process of gun safety, classes, facts & fiction etc… There are also some forums which address security issues in schools. My sister is a teacher at a high school in Texas which provided a class for teachers to complete before they would be allowed to carry on campus with a LTC.
Man that’s great with mass shootings taking place they should arm teachers.
Master your weapon, learn and practice retention, and above all else, because we’re in a school situation, always know what’s in front and beyond your intended target.