Reported in No gun control or arming teachers in Scott Walker's $100M school safety plan. (Madison.com, 3/16/2018)
There are approximately 55 million K–12 students in America and roughly 3.5 million adults employed as teachers. There are, in addition, millions of support staff—janitors, nurses, cooks, after-school-program providers, and so on. Even in the deadliest years, the chance of a student or adult being killed at school is roughly one in a million. By contrast, roughly five out of every 100,000 American residents are murdered each year. Extrapolating from this, schools are somewhere in the region of 50 times safer than society overall.
And yet you’d never know that from the level of fear that exists around schools—or from the vast amount of money we spend attempting to make them more secure.