Thank you both for your responses! One thing we're struggling with is trying to increase her interest/enthusiasm for math in general. She is currently very interested plants (genetics), engineering, chemistry, all of which require math. For ASD kids, one of the approaches is to draw them in to a subject through their interests. I'd of course love to find a retired engineer or someone like that to try to engage her in math. Do either of you know any online curricula that approach algebra or geometry through these or related subjects?