If you sell online courses, the first thing that usually surprises you is how much accessibility responsibility still belongs to you after you have chosen a platform. Teachable, Kajabi, Thinkific, Podia, LearnWorlds, and Mighty Networks all market themselves as production-ready. They are, for the parts they control. But the parts you upload -- your video lessons, your PDF worksheets, your sales pages, your email funnels -- are yours. And those are the parts that draw demand letters. This guide is written for creators, not developers. If you can edit a sales page, upload a video, and paste a link into an email, you can do every fix in this article. Why this matters more than you probably think Course creators tend to assume that accessibility complaints target big e-commerce stores and government sites. That is no longer true. Over the past eighteen months, plaintiffs' firms in California, New York, and Florida have expanded demand-letter campaigns into online education.…