Conversing with a relative, older than I, this morning. She remembered the newsreels of the Capitol being lighted up again after the end of WWII (maybe VE day?). She'd lived in the DC area until about 1943-4. I asked if she remembered air raid drills--she did, many of them, in fear of German air raids.
My memory for some things is not the best, so I'm sure we had some a-bomb drills in school, but I don't remember a lot of them, or indeed any specific one. Those drills were in fear of a Soviet nuclear attack.
Today students get active shooter drills, many of them. Unfortunately the chances of their ever encountering an active shooter, although minuscule, are significantly greater than the chance of a German air raid on DC, but perhaps not as great as a Soviet attack on DC was (except I lived 300 miles from DC).
Drills--the ones I really remember are the penmanship ones, perhaps another drill destined for the wastebasket of history.