The findings of the study are consistent with earlier research and complement it by providing a detailed delineation of the interaction from the perspective of the family. They can be used to formulate recommendations for improving caregivers' interactive skills and awareness of the topic through training. The care system should be developed to ensure that families receive psychological support and that the family as a whole receives proper care. Consideration of the viewpoint of siblings is a challenge for further research.
Here 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.
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