Ah, you're right. I downloaded both the pre-algebra (Evolver) and the algebra demo (Dimenxian). The algebra demo had the coordinate system at the beginning.
I was relatively impressed with Evolver. There are two things that might be an issue for us: (1) the video was a little choppy and the mouse was too sensitive. I was trying to adjust that. (2) it's probably more advanced game-wise for DS6. The math he could handle. The game-playing part of it might be a little beyond him at the moment. That being said, the same was true when he started playing Timez Attack. In the beginning I did the controls for that game, and he just did the math. Now it's second nature to him. DW suggested (as I was evaluating the game) that would likely be true for this game as well. He's been begging for Timez Attack to have squares, primes, negative numbers, etc., so that part of it is a really good fit.
I'm going to try out Dimenxian for a bit this evening.
Evolver would be a slam-dunk at $30 (same as Timez Attack IIRC). At twice that price it is inline with an xbox game but it makes it a tougher call.
JB
