I got out of high school right as shooter drills were starting, but I was there during terrorist drills. We were instructed there could be bombings at any moment from "terrorists" so we did things like hunker against walls. We did a few shooter drills that involved cops marching the halls and students barricading doors, but they weren't taken seriously. My school had an attitude that if any school shooters showed up, there would be students who brought their own guns so we wouldn't have to worry. It was considered normal in my town to always have a gun. One of my classmates kept a shotgun in his locker. It was bizarre and I hated it.