This is the book I'm using for Aaron's math right now:


Master Math Skill Book Grade 6
I like it a lot. He's not sold on it but we've reached a good balance. We take one page at a time and work through the problems on the pen board. I make sure he knows the subject matter - the math procedures... then I make a note on the page that he's demonstrated his proficiency by doing some of the problems on the pen board. There's lots of pages with word problems. I have him work through all of those, not just some, because I want him to see how math applies to everyday life, and how important it is to know the basics.
So far I haven't come across anything he can't do. In fact, he's surprising me - he is better at math than I expected... so this is going well for us.
Reading continues to be slow but when there's progress, I'm satisfied that our efforts are bearing fruit.