High schools in most states don't have shooting programs any more. Also no wood shop, or metal shop, or automotive classes. Budget cuts.

Youth groups do the training now. My son is a shooting instructor, was Director of shooting sports at our local camp for years.

There's a Junior Reserve Officers' Training Corps (JROTC 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_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.