Design with Accessibility in Mind » oz: the blog of glenda sims ( the goodwitch)
I'm not sure if the statistics on the increase in costs for accessible web design match exactly the costs for accessible e-learning design, but the reasons for designing e-learning with accessibility in mind are the same as given here. We're better off designing for accessibility right from the start than having to retrofit later.
Guide for accessibility specifically for online learning, looking at accessibility of the LMS and online content. Includes best practices and universal design information.