Thanks everyone, for the replies! To answer your questions StephanieU: we started Beyond late in the fall/winter, but it wasn't a great fit, seemed too easy. I had already bought other stuff we had been using so I just kept on with that. Rather than start Bigger in the middle of the year, I figured it would be good for next year (this coming fall). He seemed to be in the middle of the guides, or maybe I just wasn't sure.
We have been using Abeka history and science, which I usually read to him or he reads on his own. We talk about it, answer questions orally, or I ask him to tell me what he has read about. He does at least 15 minutes of independent fiction reading each day, things like Encyclopedia Brown or A to Z Mysteries. We have done some workbook-type language arts; he knows nouns, adjectives, verbs, sentences vs. fragments, etc. We did some handwriting and cursive, but that seems to be the hard part. It's not what to write, but rather the act of writing. Math has been tough, which seems to be my biggest area of waffling. Lol. We used a few different programs this year, always moving forward, but I know the switching does not help cement it in his mind. He seems to have a very hard time with math, concentrating or writing the problems....I don't know....I think that's why I kept switching. We started with BJU online and he was too distracted, so we just used the workbook. Then we used some of Singapore 2A. Then we finished with MUS because his brother was using it and I thought it would be very simple for him to understand. He has done most of his multiplication tables.
Sometimes he tries to do the problems in his mind, without writing it out (maybe because of the writing?). I did give him the 2A placement test and, honestly, I had to sit there with him and coach him through each problem. That's how math goes for us. If I leave him to do a worksheet he will literally sit for hours with no problems done. Usually I sit with him and even then I have to keep coaching, "come on, let's do this first one...what is it asking...read the problem...look at this one" Ugh.

I don't know how accurate the results were because I had to help him do some of them. He got the ones about kg vs. g and all those other measurements wrong.
He is a smart, articulate boy. Example of what he is capable of: his older brothers are in a co-op for teens. Since it's at a friend's house we all hang out and DS8 has been sitting in on classes. They had to do a geography report on a country of their choice, which he was not expected to do. But he wanted to. He did it way ahead of time. He went on the computer and researched his country, typed up a whole, single-spaced page and printed out photos to go along with it. It's informative and infused with his sense of humor. He will present it orally to the class this Friday.
So, that's where we are and I am having trouble placing him.

Thanks for reading all this!