I agree that publishers are not fully aware of the need and schools often don't ask about accessibility when evaluating new curriculum. For the past year or so, I have made an effort to contact the company when I find a digital program is not accessible. I politely ask if they have an accessible version or a work around. So far the answer is no but it is a way to advocate and raise awareness to the publisher. I did have one small company set up a couple of meetings with their IT staff member to gather information about ways to make some changes to their program.