I think my son should be graded differently because he has special needs
What kind of special needs does your son have?
His special needs reduces his IQ at around 70, and he doesn't know how to study, and his work has fewer merits than his other classmates.
I'm glad you are very concerned about your son's needs, and he does really need to have his own system. He is not like other children and shouldn't be held to their standards. It is very unfair to him if that happens and he won't thrive, or will be very discouraged.
This is unfair. I'll complain to the school people, see what they have to say.
Yeah, special education needs way more accommodation than what we currently have. Every child has their own needs, and yours is no exception. It's great you want to fight for him to help him learn better and at his own pace.