Teorema de Pitágoras

The present article is an excerpt from a master's thesis aimed at investigating the potentials and limitations of a structured teaching intervention using tactile materials on the Pythagorean theorem for visually impaired students. The qualitative study, conducted in the form of a case study, was grounded in Vygotsky's sociocultural theory and involved two blind students attending the 2nd year of high school in two public schools located in the municipalities of Barueri and Itapevi, in the state of São Paulo. The results indicated that the interaction of the students with the adapted material and the mediation of the teacher allowed the participants to articulate the zone of proximal development, the level of actual development, and the level of potential development, making the transformation of potential and actual development evident.