In the theoretical part of the thesis it is explained the requirements of teaching aids. These tools are designed for children in grammar art schools and high schools of art. The work deals with the methods of teaching that are closely connected with teaching aids, e. g. senses of perception, description and examples of tools, mediation curriculum, teaching lessons a logical construction, etc. The result is a set of variable methodological tools following learned.

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OF THE THESIS The topic of this thesis is to study the cognitive processes (especially perception, imagination and thinking) of blind pupils through experiments with geometric objects. Tools of the experiment are four tasks (two for one pupil, two for a pair of pupils) that are recorded, transcribed into written protocols and analysed. An overview of the involved cognitive functions or naming of missing cognitive functions has been complied on basis of the specialised literature as a theoretical solution of analysis. Findings of psychology of mathematics didactic were other important theoretical starting points. The ones which are devoted to the tactile perception (of geometrical objects), stages of Piaget operation developments, cognitive mechanisms in mathematics and importance of communication in mathematics or geometry teaching are involved in the theses. Analysis of the experiments involves observations of the tactile perception, imaginations, thinking, cognitive processes, speech and communication, and other occurrences essential for specific tasks.