My son, who is a junior in HS with ADHD, has found that he sometimes makes simple math “typos” that affect his grades. He does “get it” but his brain doesn’t slow down long enough to circle back and check his work. He has found that it takes real effort—and sometimes an extended test taking time—to make sure he double checks everything.
If your accommodations aren’t being met, that is something your parents should follow up on at school. They are required to meet your accommodation needs if they are documented in a 504 or IEP and they should be reviewing those accommodations every year.
It’s good that you are learning what you need to be successful. Another amazing lesson is to advocate for yourself when you need to. I hope your parents can help and support you here—it’s a tricky lesson but worth learning.
Good luck!