Disabled students may need to use assistive technology, such as screen readers, voice control, head pointers, specialized keyboards, or mouth sticks, to use and navigate a tool. Unfortunately, some tools are not designed to be accessible by everyone, including individuals who use assistive technology.
I am glad that this detail was included in the article. Being someone who has worked with a disabled family member my entire life, I have seen how frustrating it can be when they are not provided the necessary assistive technology.