Braille Math

• Many standards for braille math, even within a single country
  All of the standards linearize math.
• In the US, Canada, and New Zealand, Nemeth code is the most common
• Other English speaking countries use a considerably different code
• Only 1/3 to 1/2 of math students and teachers learn Nemeth code
  Almost no math teachers outside of blind schools know it
• "dots-plus" is an experimental 2D alternative