I am a JAWS user and have taken thirty courses in Canvas and am now creating a course.
It is tricky to get to the RCE with JAWS, but that's because JAWS is using the keyboard to read stuff, and you want to use the keyboard to edit stuff.
You have to force JAWS to go in to Application mode, which tells JAWS to stop interpreting keystrokes and let Canvas interpret them instead.
Then all your keystrokes will work; your arrows will let you move the cursor through the text rather than moving the JAWS reading cursor. What's happening with your instructor is that his presses of the arrow keys move what JAWS calls the virtual cursor so he can't do anything but read -- JAWS by default reads a page with the keyboard, you cannot interact.
The trick is this. Arrow down to where you can start reading the toolbar and find a nondescructive item like align left. Press Enter on it.
When you press Enter, JAWS realizes you are now in a web application and lets go control of the keyboard and turns its virtual cursor off.
But there's still a problem. You are focused on the toolbar, not on the word processing Window of the RCE. So you have to press Escape to tell Canvas to take you to the RCE.
If you take the JAWS reading cursor down to the editing portion of the RCE and press Enter, JAWS doesn't recognize you are in a web application. I think the aria codes for application mdoe might be in a slightly wrong place in the source for Canvas but I'm not sure about that. What does happen is that JAWS tries to go in to forms mode, then goes back in to virtual cursor mode, making interaction with the RCE impossible.
Hope this helps.
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