It doesn't make them go through textbooks. But it doesn't stop them either, and often a decent textbook is the best way to learn about a subject.
As someone who chose to learn some subjects outside of school (usually years before they would have been taught), I tended to read textbooks my older siblings had used—did this for algebra, physics, and calculus—although I didn't do that many problems from the textbooks. (I also read lots of what might be called popular science books.) The article does say "[The McQueen] parents spurn curriculums, textbooks, tests and grades", but I know some unschoolers, and I suspect if I asked them, I would find that they read several textbooks.
One unschooling mom's website quotes (seemingly with approval) another unschooling mom's email on the subject. Ultimately it seems to be saying that, while textbooks shouldn't be the primary tool, they are a tool that is sometimes appropriate. https://sandradodd.com/school/textbooks
As someone who chose to learn some subjects outside of school (usually years before they would have been taught), I tended to read textbooks my older siblings had used—did this for algebra, physics, and calculus—although I didn't do that many problems from the textbooks. (I also read lots of what might be called popular science books.) The article does say "[The McQueen] parents spurn curriculums, textbooks, tests and grades", but I know some unschoolers, and I suspect if I asked them, I would find that they read several textbooks.
One unschooling mom's website quotes (seemingly with approval) another unschooling mom's email on the subject. Ultimately it seems to be saying that, while textbooks shouldn't be the primary tool, they are a tool that is sometimes appropriate. https://sandradodd.com/school/textbooks