In Arizona, you are allowed to hunt big game starting at 10 (supervised by an adult). My daughter drew a javelina tag so I bought her a .223 single-shot rifle. Until this year, she had been trying to shoot a .22 with no success. She "claimed" she couldn't close her left eye properly (she's right handed). Several shooting sessions (pellet gun and .22) had ended with both of us very frustrated.
When I took her to the range before hunting season, I tried a different tack - I just let her shoot left-handed. She put her first 20 rounds into a 3-inch group at 100 yards. Prior to that, it would have been unusual for her to get all of her rounds on the paper. For now, I'll let her stick with that.