Originally Posted by Val
Here's problem with homeschooling for a year, learned the hard way at our house.

Schools won't accept courses that aren't taught by accredited institutions. I taught algebra 2 to my son last year because we didn't like the online courses we found. When he went to the local high school this year, they wouldn't give him credit for the course or for another course he did with me. So now he's behind on credits. This sounds bad, but he it could have been much worse. His counselor initially told us that they might make him repeat algebra 2! Then there was a bit of a mixup, and in its midst, he just got enrolled in precalculus. We kept our mouths shut. I should add that what I taught was way more rigorous that the local high school's course.

Local middle schools (public/private) have said the same thing about me teaching algebra to my daughter, and I'm only trying to persuade them to let her skip pre-algebra and just do their algebra course. In their minds, there is a procedure, and it must be followed. Anything off the path doesn't count.
I already posted a cynical explanation of why they do this. But suppose they are acting in good faith and are reluctant to give credit because they want ensure that students properly learn the material. Is there documentation they will accept, for example a student notebook with completed assignments, supplemented by a proctored exam?