I'll add another workbook idea for parents on here.
These books were recommended by a teacher at the gifted school that my dds attend. I have no vested interested in these books. I've just used them and enjoyed them.
http://www.summerskills.com/I haven't used the language arts book yet, but the thing I like about the summer skills math sharpener is that each "lesson" is only one page (front and back). So it's easy to have your child do one on any given day over the summer. Plus, each page has a variety of topics on it (money, time, calculations, word problems) so it's not the boring repetition that so many of our kids dislike.
Also, you can preview pages on their website to find the appropriate placement for your kids.
I ordered 3rd grade review for DD6 earlier this spring with the intention of doing it this summer. But, of course, she got a hold of it and whipped through it.
So now I've ordered 4th grade for her and 1st grade for DD5.
