Abstract
□ A new tool, a tactual map or chart with interchangeable pieces, has been created for teachers of the blind. The chart can be used to teach general principles of the geography of foot travel, and it can be used to diagram actual specific situations. Because it is light weight and portable, one set of materials can serve many students who are taught in different locations. The materials are relatively permanent, but can be used in infinite combinations and for many purposes in addition to orientation and mobility. With it the instructor can test the student's orientation and his grasp of concepts. The flexible chart challenges but does not restrict the instructor's ingenuity in developing his own modifications and uses. To the best of our knowledge, it is a genuine innovation in the field of education of the blind.
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