Acknowledgements Acknowledgements
Partial support for this work was provided by the \grantsponsor{National Science Foundation}'s Improving Undergraduate STEM Education (IUSE) program under Award No. 1821706. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
We are also grateful to the American Institute of Mathematics for funding, the National Federation of the Blind for hosting a workshop on Tactile Mathematical Textbooks, which helped us to get started with this work, and David Farmer for helping with the creation of the PreTeXt version of this paper.
