Hello and welcome to PowerPoint and Friends, Accessible Slides on the Web.
A good slideshow does not, and arguably should not, serve as a presentation in and of itself.
Instead, a slideshow is typically used to supplement a presentation.
So, slides delivered over the web can be most effective if they too are used a supplement to a presentation.
One could therefore argue from a pedagogical standpoint that a narrated video is the best format for delivering a slideshow over the web.
In order to be accessible, the video must be captioned.
And the lecturer must be sure to verbalize the content of each slide, just as they should in a live presentation.
I'm not doing so in this video because my slides contain, well, no useful content.
Except perhaps for this slide, which contains URLs for the DO-IT website and for the current presentation.