An unwilling truant

[Igel]

4. The state matters.

In some states, it's illegal.

In other states, regulated. Sometimes greatly, sometimes only moderately.

In a state like Texas, if the parents have the merest hint of a suggestion of an outline of a whiff of a curriculum, that's fine.

It's also a question of whether the kid's telling the unvarnished truth or exaggerating. I'm guessing he's not.

Contact child protective services. An alternative would be any high school principal in the state; they'd know the law, and if they're going to err it'll be on the side of being too aggressive in actions against homeschooling.