All rights reserved application/pdf 714836 bytes "Aurel Vlaicu" University, Arad Pedagogical perspective onill-defined mathematical problems 2021 Journal Plus Education 29(2) Keywords: task classification, problem posing, problem space, (in)completely posed problems Милинковић, Јасмина Радовановић, Ивица eng Abstract: Traditionally teaching mathematics in schools is based primarilyon well-posed problems. Intuitively, there is a clear difference between them and ill-defined problems. Research in the field of problem-solving is often based on the analysis of procedures for solving incompletely posed problems (i.e.ill-defined problems) because they are expected to provide a deeper insight into mathematical abilities as well as the ability of critical and creative thinking of respondents. However, ill-defined problems are scarcely explored as a main subject of interest. This paper aims to investigate the place of those types of problems in teaching mathematics. As a context of the investigation, we consider various classifications of math problems. Three classificationsof mathematical problems with a "pedagogical perspective" are elected to be analyzed using the theoretical epistemological method of comparative analysis. All three classifications consider the position of participants in problem-solving, teacher and students. As aresult of the analysis, we create a comparison of the spectrums of problems, particularly paying attention to ill-defined problems in them. The discussion finishes addressing the place and purpose of using ill-defined problems in mathematics instructions. https://phaidrabg.bg.ac.rs/o:26367 doi:10.24250/jpe/2/2021/JM/IR ISSN: 1842-077X info:eu-repo/semantics/article