A plate from the Coordinate Geometry Curriculum

• Material that is covered by this brief curriculum includes discussion of the features of a coordinate grid; use of Pythagorean Theorem to calculate the distance between any two points; delta notation; equations of lines; and slope. 
• The curriculum includes a sequence of tactile digrams that are produced on five overlay sheets which fit on the TTT device.
• This application has undergone user testing by a group of visually impaired students.