Keyboard navigation and screen readers

Since screen reader software has mapped functions for left and right arrow, how does a screen reader user to use left and right arrow to navigate between the slides of a course presentation?

The course presentation even announces to JAWS user to "use left and right arrows" to move between slides when "canvas has focus." Unfortunately that does not seem to be working.

I thought perhaps forms mode, but thus far the experience has been inconsistent/inaccessible.

Any ideas/direction would be greatly appreciated.


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