| Quote #1
"Don't you go to school at all?"
"Sure I go to school."
"At home." (4.62-65)
For Billy, home and school are the one and the same. Clearly this is before the whole homeschooling revival, because the boys in town think this is stupid enough to pick a fight over.
| Quote #2
I knew the stories I had heard about marshals weren't true. Never again would I be scared when I saw one. (5.87)
Check it out: informal education, broadening minds. Billy is already beginning to revise his assumptions about town people, but he's not doing it through books—it's direct experience.
| Quote #3
"A man's children should have an education. They should get out and see the world and meet people." (6.60)
Well, gee whiz. That's just what Billy did: he went out into the world, met some people, and learned a few things. So maybe Billy's dad isn't necessarily talking about education in school.