I found the panning and navigation okay but the other person didn’t (she’s one of the most IT illiterate people I know but never gives up). I think her point about the text size relates to the indivdual tabbles rather than the categories. I’m using a 22" monitor and by the time the tabble names are in about Arial 12 I can only see about 2-4 categories on the screen. I’ll have a think about education categories over the next couple of days.
Looks promising so far. I posted a question looking for similar tools on a couple of accessibility forums and so far the only suggestion has been to use Microsft OneNote.