My son will be 9th grade next year and is way behind in school. He has a lower IQ and auditory processing disorder. I worried about high school too. But, I read some things from HSLD and went to a homeschooling for high school course locally and here are some of the things I learned from those.
If you give them courses that are hard enough for them, they are progressing in work level from grade to grade (no matter what level that is), you can count that as their high school courses on a transcript. For instance, you don’t have to put Algebra I, you can put Math 9. You can put Biology, even if it’s an easier version of high school biology. If it’s at their challenge level, it counts. High schools give diplomas to kids like this all the time. Unless your child is severely special needs – like Down’s Syndrome – don’t give some sort of “special” certificate instead of a regular diplome. It will seriously hamper whatever they want to do later – job, trade school, etc.
What will my child do for 9th grade? We are using a lower level (than his grade level) of Queen’s Language Lessons, a paragraph writing program I got for remedial kids, Queen’s history (with lower requirements than his grade level), Biology 101 Cd’s (hoping this isn’t too hard for him – he is very visual, so videos are good), a remedial geography workbook, and Practical Arithmetic (about 6th grade level – strangely this is the only math I can get to work at all with him). I will also use a series of Life Skills workbooks with him that I got at a rededial store. It all will could for credits along with some PE, and other things he does that can be construed as a course- small business skills for his weedeating for pay from the neighbors, etc.
All that to say, that high school doesn’t have to look college prep to be legitimate and to graduate them with a diploma.