There's a Junior Reserve Officers' Training Corps (JROTC https://en.wikipedia.org/wiki/Junior_Reserve_Officers%27_Training_Corps https://en.wikipedia.org/wiki/J

There's a Junior Reserve Officers' Training Corps (JROTC https://en.wikipedia.org/wiki/Junior_Reserve_Officers%27_Training_Corps https://en.wikipedia.org/wiki/Junior_Reserve_Officers%27_Tra...) program that's reasonably popular in many parts of the US, and weapons training is a popular part of it. When I did it in the late '70s it was small bore/.22LR in the winter when getting out wasn't so practical, and there was an opportunity to go to a "summer camp" where you would practice with real service rifles, practice grenades (they wouldn't let the young ones try out real ones), putting on a gas mask in a tear gas chamber, basically a junior boot camp sort of thing. My parents were no fun at all and wouldn't let me attend the latter :-( which due to eyesight was the closest I ever could get to the real thing ). And of course a rifle team, in which I had a lot of fun, small bore rifles, 50 feet, the "10" was a dot the size of the hole a needle makes in a piece of paper. Quite challenging and two years of early morning practice really improved my marksmanship, even got a nifty and 100% authentic Expert marksmanship badge (https://en.wikipedia.org/wiki/Marksmanship_Badges_(United_States)#United_States_Army https://en.wikipedia.org/wiki/Marksmanship_Badges_(United_St...). We on the team helped with the safety monitoring and instruction in the winter rifle marksmanship and that was very worthwhile as well, teaching a novice well enough to get a Marksman badge was a great experience and generally useful for life. In fact, teaching others was one of the things JROTC explicitly taught, as they pointed out the Army has to constantly teach a lot of people all sorts of things. Definitely one of the most useful things I learned in high school.