Hmm, this is a great question. (Thank you for asking!)
One thing that might be helpful is an overview of the tools students may be using to access their sites, and how designers can use these to check our courses. Accessibility became much easier for me to understand after a class where we did this: understanding how screen readers function, the experience of tabbing around a website, or what a webpage looks like to a user who's colorblind, kind of blew my mind. Sharing the accessibility tools that are available right on our laptops, and examples of how simple fixes to some accessibility problems can be, might be a good way of getting everyone to experiment with the approaches and fixes you speak to in the rest of your presentation. I'm excited to see this (though sadly not in person)!
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