My son wouldn't write and when he did, it was slow and hard to read. He didn't want to type either. I told him to learn as much as he could at school but to go at his own pace and feel good about his progress. So he did. He learned a lot, never jumped through all the hoops to get enough credits to graduate but his teachers said he knew the school work well enough to help teach the other kids in the class.
We didn't care about grades. Having a confident kid who wasn't collapsing under pressure, anxiety, panic and phobia was more important. He's in college now, writing and interacting and enjoying classes, doing all the work and getting A's. I think that the learning path for people on the autism spectrum is a way, way, way different path. If they try to follow the NT paths in modified autistic ways, it's not going to let them become who they really are.
I told my son it's like the whole class was ordered to go into a house and head to the living room so they all went in through the front door. He had to take the scenic route into the backyard, through the kitchen door but, eventually he, too, made it to the living room.
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Time flies like an arrow. Fruit flies like a banana.