For starts, if what I am hearing is true, forty percent of gun acquisitions do not even include a background check.
OK, so what do you propose? No more private sales? And how is that accomplished - unless you include a fully retroactive gun registration (good luck enforcing that), you have some 300M firearms in circulation that will still be available for private sale. "Oh, I bought this from so-and-so before the new law went into effect."
Not trying to be difficult, just wanting an explanation the nuts and bolts - how do you make this new law effective? What are the mechanics behind it? It's easy to talk about new laws, but with comprehensively showing how they can be an effective dissuasion to crime, it's wasted effort.
How does making private firearm sales illegal make the schools any safer?