I've seen something similar on a chromebook.
The navigation panel was minimized then (thinking it was due to the small screen size) and she had to open it up by clicking on the menu icon. That is the 3 bars to the left of the R4M22020 text. There are two menu icons in the screen shot this one is the lower of the two.
If your student presses on that then the navigation panel should slide out and allow her to move to another section. The panel will most likely slide back in (off screen) once she presses something. I assume her fire device has a small screen and canvas is trying to give more space to the course content.
Hope this helps you.
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