I think the boater safety class was after hours at the junior high school I went to, and the hunter safety class was probably the same. I think they were optional, but first aid was mandatory if I recall correctly. I was Red Cross Certified in Basic First Aid at age 11. To this day, to get a hunting license, you either need to show an old hunting license or proof you took a hunter safety course, of like me this year, sign a statement saying you took the course a long time ago.
But most education about guns, I got from my dad. I learned how to shoot, and when not to to shoot, and started hunting small game when I was a kid. I got my first shotgun and .22 rifle when I was a kid. I don't know many people who carried back then. One of my uncles was a constable in the U.P. who I hunted coyotes with on snowmobiles. He had a Beretta .380 in his pocket one day. I doubt he ever had any kind of formal training at all. One of my cousins in Pennsylvania was a bank manager and had a snub-nosed revolver he carried when he was transferring money from one bank to another. Seeing that it was Pennsylvania in the '70s, he may have had to get some kind of training.