抄録
We considered the systematization of developed open-ended problems based on the following two aims by treating open-ended problems in classroom teaching in elementary school mathematics; The first aim is related to the objective and assessment of mathematics teaching, and the second aim is related to the teaching method of school mathematics. We assigned developed open-ended problems by making two-dimensional matrix; Vertical items are four types of solving open-ended problems (how to find, how to classify, how to measure and how to construct). Horizontal items are four curriculum contents in elementary school mathematics (A Numbers and Calculations, Quantities and Measurements, Geometrical Figures, Quantitative Relations). As results, we could clarify the aims to treat open-ended problems at each cell of two-dimensional matrix systematically and find out the effective method to develop open-ended problems by using two-dimensional matrix analysis. From now on, we have to develop open-ended problems in the empty cells of two-dimentional matrix and continue to consider the systematization of open-ended problems.
