My dad taught me to shoot at an early age. He gave me a .22 LR single shot lever-action Ithaca when I was 8. He wanted me to concentrate on accuracy and not try to compensate with firepower. Compared to my friends with their semiauto .22 rifles, it seemed to work. They were always amazed at how ell I could shoot with my Ithaca.
I'm sure my dad taught me technique, but what stuck most was safety.
I took two NRA hunter safety courses. One we brought .22 rifles and were taught gun handling within a deer hunting context. The second course we brought shotguns and were taught safety in the context of bird hunting. Interestingly, in indoor part of both classes was held in the local high school gymnasium, gun in hand, on a Saturday. Shooting was part of both classes. Again, I'm sure shooting technique was addressed, but what I remember a half century later is the safety aspects.
As a Boy Scout I earned my shooting merit badge at summer camp. As safety was well ingrained by that time, what I recall was the technique and positions, as a major part of the requirements was attaining a minimal score from, as I recall, four positions.
When I decided to get my CPL four years ago, no training is required in WA, but I opted to take a 4-hr handgun class. The lecture part was close to useless. The shooting portion allowed me to fire a range of handguns and help me narrow down my purchasing goals.
The biggest deficiency in the handgun class was that relevant laws were not addressed. Instead, the instructor advised us to consult an attorney. Fortunately, prior to passage of I-594 the state's firearms laws were relatively compact in size, so I was able to read them and understand them