Kind of like an "affordable care act".
Authorize each State's National Guard to offer military grade rifle and pistol marksmanship training at reasonable cost to all peaceable, taxpaying citizens. There are, apparently, several hundred million rifles, pistols, and shotguns owned by the private citizens of these United States. The owners of said firearms need to have the greatest effectiveness in controlling them.
It's for the children ... if better preparedness for self-defense saves even one life, it's worth it.