Mathematics and geometry are often taught to blind students using a cork board with raised grid lines, push pins and rubber bands. The right image shows a teacher explaining the use of the Graphic Aid for Mathematics, a physical kit sold by the American Printing House for the Blind.
Date of invention unknown.
- Suzan Osterhaus (2001) Teaching Math to Visually Impaired Students.
- Youtube video series explaining the traditional cork board: APH Graph Board with Susan Osterhaus.
- McGookin et al. (2010) Clutching at Straws: Using Tangible Interaction to Provide Non-Visual Access to Graphs.