Here's what I wrote on another board:
I've been homeschooling for a long time (my 18 yo just graduated in May), and have played around with quite a few math options.
What I've learned is that math games (online, CD-Rom, board games, even playing blackjack when they're learning to add) teach far more than any textbook. Frog Pond Fractions, S'Math, Math Bingo, Snap It Up Math, etc.
I use a lot of basic books for myself, so I can explain properly...my favorite author is Isaac Asimov for math explanations. "Realm of Measure" and "Realm of Numbers" are the first two that pop into my head.
As far as curriculum goes, here's our experience (and I'm sure it's as strange and varied as any out there, so take it all with a grain of salt):
Saxon totally didn't work for us. There was a lot of repetition, and my daughter simply didn't like that.
DK Math Made Easy workbooks ROCK. They even make them in Marvel Comic characters now, although I've not bought those yet. They're fun, portable, bright, and engaging. No huge textbooks to lug around and no feeling of being totally overwhelmed by how much is left in your workbook.
Spectrum Math books are good for review, but they're all one color, and that appears to kids like a huge hurdle. That gray-brown page, filled with problems, with no colors, no pictures, no fun, just work.
We did use Oak Meadow when my now-graduate was in...5th grade? I REALLY disliked it. The typeface was a mess, there was no room to work the problems in the workbook, it was just not well put together. That may have changed over the years.
We tried Singapore Math but I think I just didn't have a good grasp of the levels. It didn't work well for us, although it was interesting.
Right Start Math really clicked with my now-5th-grader (he's 10). He LOVED how they taught math, and understood everything waaaaay before I did. HOWEVER, we do state-mandated testing here, and I had to spend quite a bit of time teaching him how to write down how he got his answers. All of his answers were RIGHT, but if the kids don't write their processes down, they only get 1 out of a possible 4 points per question. That was rough for him. I love how Right Start teaches them to *think* about how numbers work, but on a higher level of math, it just wasn't going to fit.
So now we're using Teaching Textbooks, and he's LOVING how fun and easy it is. The CD-Roms are cute and funny, as well as educational. They *are* a bit easier than other curricula, but for us that's a plus right now. 10 seems to be an age of "OHMYGAWDI'LLNEVERGETALLTHISDONE!!" So we're trying to lower the stress levels.
Good luck, sorry for the novel.
Forgot to mention we also used The Noble Knights of Knowledge for math, although more as a supplement. They had some wonderful ways to explain basic things (odd and even, for example). There were a few issues with the kit (animals too large for the spaces they were supposed to stand on during games, stuff like that), but as a fun math supplement, it rocks.