Mo. Rev. Stat. § 170.132: Preference given to educational materials available in Braille or electronic format, public schools.

All public elementary, secondary and postsecondary schools shall preferentially procure educational materials, including textbooks and collateral materials, from vendors who make the materials available in either Braille format or electronic format which is computer-readable in a form approved by the department of elementary and secondary education, or both, at no greater cost than for regular materials.