Counting Triangles with 3D Printed Didactic Materials for People with Visual Impairment

Digital accessibility includes producing learning materials for various sensor needs such as objects supporting tactile learning in visually impaired people. Here are presented 3D printing models related to triangle-counting tasks suitable for use by people with visual impairment. 3D printing files and the corresponding models made from them are given, as well as the system of triangle-counting tasks that help solve with links to 3D triangle model files, an example methodology for their use, as well as some typical errors and options for overcoming them. Some results of work with them by people with visual impairment and attendees of an interdisciplinary seminar are described. The developed scenarios for working with the 3D models are suitable for use in the classroom and in STEM centers with different consumer groups.