I never knew about dyslexia-friendly fonts...
Till I read this. From Daniel Hamermesh, writing in Freakonomics.
I write all my papers, letters, and exams using the typeface Times New Roman. As a lunch-table discussion here in England revealed, the University insists on certain typefaces that are dyslexia-friendly, particularly Arial, Trebuchet, and Verdana. It costs me or any other faculty member nothing to use one of these on exams; non-dyslexic students are not harmed by them, and dyslexic students are better off. Henceforth, no more Times New Roman on tests — mine will all be in Arial. A clear Pareto improvement.