Debbie Krahmer of the Council on Library & Information Resources (CLIR) Digital Library Federation (DLF) gave a one-hour webinar in July 2022 on Creating Accessible Presentations. If you don't have time to watch the recording or read the transcript, there is also a Wiki page, from which the LD4 Accessibility Committee has extracted some important points below:
Have the slides available to attendees beforehand
Slides can be uploaded to your session description on Sched (instructions here)
Share a link to slides at the beginning of your presentation
Attendees can "pre-process" your presentation before you deliver it
Attendees can follow along and take notes while you deliver it
Use built-in templates from your preferred slideshow application (PowerPoint, Google Slides, etc)
Designed for accessibility
Provide outline structure that screen readers can follow
Use contrasting colors and large font sizes
Limit text/bullets on slides
Test slides for accessibility before submitting
PowerPoint has a built-in checker (“Check Accessibility”)
Google Slides plug-ins Accessibility Checker for Slides or Grackle Slides
Speak clearly and face the camera
Some attendees may find it helpful to read your lips as you're speaking
Add in pauses to allow processing time
for attendees with neurodivergence
for attendees for whom English is not their first language
for attendees who take notes
Avoid jargon and acronyms
Spell out and define abbreviations and acronyms at least once
Define domain-specific terms that attendees may not be familiar with
Briefly describe any non-decorative images
Digital Library Federation. (2022, August 17). Creating accessible presentations 2022. DLF Wiki. https://wiki.diglib.org/Creating_Accessible_Presentations_2022
Digital Library Federation. (2023, February 13). Creating accessible in-person presentations. DLF Wiki. https://wiki.diglib.org/Creating_Accessible_In-Person_Presentations