Floridama, wish I could offer you advice but we're going through something very similar. Our child is probably at the end of year 2nd level or early 3rd grade for reading, but DS isn't in the highest reading group in first. (They think there is an issue with comprehension, which I doubt. There is an issue with DS's willingness to write about what he's read.)
We basically unschool. We don't necessarily do vocab words and such, but we make available any reading material DS wants. DW will also, from time to time, do "projects" with DS like a whale project where he researched the topic and then write up a little report on it. We turned that into the school, but this could have also been a summer project.
We're slightly jaded at the moment, so we're really focusing on the enrichment opportunities outside of school. If the fourth grade teacher helps you, then great. Sounds like a good summer project.
JB
