Not sure if this is relevant or not, considering it's not really "subject matter", but deals with writing. DS10 skipped 4th grade and we've been really working with his written expression. It is a weaker area for him because he just doesn't care to write (handwrite or express himself), but we've also been told that there's quite a bit of writing instruction in 4th grade. He's in 6th now and I've already been in touch with his teacher (he's in a blended type Charter school where he does work at home, but meets with his teacher once a week) regarding the writing.

Luckily for us, I guess, his teacher taught 4th grade previously and said he'd work with DS to develop the output skills. It's really frustrating for DS because he's got content knowledge floating around in his head and can talk to you about it all day long, but ask him to write a paragraph about something and big chunks are missing. I'm really hoping he'll have some success with it this year. We aren't sorry that the skip took place because it was needed, but writing is just an area not as advanced as the others.