I posted this on the TIE Facebook group too, but it definitely belongs here. EdWeb's Game-Based Learning Community is vibrant, active, and populated by some really great names in serious game development and education. You should all sign up!
This is an interesting series of math games that try to teach a spatial approach to math with no equations, symbols, or language (at least at the start). There's an option to try out some of the games on the left. The state of California has been hosting a huge study using ST Math in numerous low-performing K-5 schools, and the preliminary results make it look pretty good. I'd be interested to hear what you think of these games--do they look intrinsically integrated to you? Could you see yourself learning the math concepts from these games--even if this were your first exposure to those concepts?
I like the idea of teaching the underlying concept without using words or symbols.
The estimate fractions was pretty intrinsically integrated and I can see myself better understanding halves and three-quarters... a bit like motionmath but ST math has got so many more games !