I homeschool both of my daughters, one of whom is ADHD-Combined. We know many families who homeschool autistic children, as well as children with other learning disabilities. The great thing about homeschooling is that you can move at your child's pace. Though I can't speak for what's available where you live, here in California, there are hybrid homeschooling programs through charter schools where you can do most of your child's schooling at home (or through co-ops, or other venues), and still sign up to do certain classes at the charter school itself. For instance, maybe your child would like to do a science lab class in a school classroom setting, but the rest of her subjects at home. Or she might want to join the school choir and take a creative writing class at the school.
For ADHD kids in particular, homeschooling can be a huge win. I know for my daughter, we currently don't have her on any medication (I am not against it, but my daughter suffered some side effects that weren't so great, so we put it on hold for now). We are still able to complete school in a few hours per day, and I'm able to teach her in ways that use some of her boundless energy. For instance, today we played Grammar Olympics, where I taped various easily confused words on the floor (such as they're, their, and there, effect, affect, let's, lets) and read sentences aloud. She then had to jump to the correct word. We also have Grammar Twister, which is a similar concept, except that the words are on a Twister game (put your right hand on the correct answer, etc.). After lunch, I read to her while she does hand crafts (embroidery, knitting, and so on).
She's able to be active while learning, which makes things so much easier. It's hard for a normal child to sit still for a long time, but for ADHD kids, it's torture! For us, homeschooling has been a godsend. I won't lie, it takes work, but it's worth it.