DS1 is 10 and has AS. Generally speaking he doesn't struggle too much with being different, although he is, IYSWIM. He's been lucky with a lovely class (mostly) and has some friends who are pretty loyal.
A few weeks ago he told me that a few Y6 boys had been calling him names and shoving him, but he said it wasn't only him they were picking on, and he could cope with it and PLEASE would I not do anything as I would only make things worse. I said I wouldn't do anything without his permission, in exchange for a promise from him that he would keep talking to me and not shut me out of what is happening.
So last week these boys shoved ds1 and his friend in the lost property bin (big thing on wheels) and spun it round and were calling ds1 "weirdo" and being pretty nasty. He was upset about this but still didn't want me to do anything. We had a big talk with dh as well about what exactly happened and what we could do to help. DS1 didn't retaliate, he told his teacher and she went out and spoke to them, and he thinks they may have got detention.
On Saturday I let him and ds2 (8) go to the park for an hour - very big privilege, they have earned our trust gradually, they had a phone with them etc. They came back early saying they had met these Y6 boys in the park and they had been shoving them, blocking their path, calling him a weirdo again and swearing at ds2 and taking the piss out of his name 
So I talked to ds1 again and we agreed that I would call the Head to talk about it, especially as it is now encroaching on life outside school. I called this morning and she is going to call me back when she is free.
ANY advice at all would be gratefully received. I feel awful
and we live in a small community, he will be going to secondary school with these boys.