Hannula, Markku S.Pehkonen, ErkkiMaijala, HannaSoro, Riitta2024-09-042024-09-042006-12-01Teaching Mathematics and Computer Science, Vol. 4 No. 2 (2006) , 317-3371589-7389https://hdl.handle.net/2437/379585Here we report some results of a two-year study for grades 5-6 and 7-8 (during the academic years 2001-03). The study included a quantitative survey for approximately 150 Finnish mathematics classes out of which 10 classes were selected to a longitudinal part of the study. Additionally, 40 students from these classes participated also a qualitative study. This paper will focus on students' understanding of infinity and the development of that understanding. The results show that most of the students did not have a proper view of infinity but that the share of able students grew, as the students got older.application/pdfinfinitymetaphorsconceptual changeunderstandingfolyóiratcikkOpen AccessMarkku S. Hannula, Erkki Pehkonen, Hanna Maijala and Riitta Sorohttps://doi.org/10.5485/TMCS.2006.0129Teaching Mathematics and Computer Science24Teach. Math. Comp. Sci.2676-8364