Koepsel, A.P.P. and Baier, T. 2019. The use of manipulative didactic material and fractal geometry for the learning of the concepts of area and square perimeter: a case study involving a student with low vision. Special Education Magazine. 32, (Jan. 2019), e4/ 1–15. DOI:https://doi.org/10.5902/1984686X26287.