Years ago, I had the privilege of working on a grant from NASA with a great team of educators and programmers from The Center for Accessible Technology and InfoUse. This set of aeronautics and math activities, called PlaneMath, is the result. The intended audience is students in grades 3-5, including students with disabilities. The activities highlight aeronautics professionals who have disabilities. It’s now technologically very out of date, but it was a really fun early effort to create accessible math activities online (before Java, php, W3C and so much more!).