Cool website, I just bookmarked it. I've seen that there comes a point when math really isn't that fun at the elementary level. I think DD8 didn't love math when she hit multiplication.
I did do some things with geometry, but followed some advice I was given about making her plod through and memorize the facts before going too far beyond.
She likes Aleks Quick Tables. They add the element of speed, which makes it more exciting, then after a certain amount of work the child can access games in which the use the facts they know to "win".
I was advised that it would be a good idea to get her to the point of instant recall for mult. and div. facts because everything that came next was going to draw on that.

That's what I've been seeing so far, but also I think by algebra and beyond it becomes more interesting for them again, at least I hope so.