Mathematics and idioms, as well as proverbs, all reflect the laws of life. At the same time, primary school children may have heard idioms and proverbs before attending school. Therefore, there are many possibilities to exploit and apply idioms and proverbs in teaching mathematics in primary schools. This study aims to identify appropriate situations and apply idioms and proverbs in different regions of Vietnam to teaching mathematics. The researchers selected 1155 expressions related to mathematics from many typical pieces of research on idioms and proverbs in Vietnam. After surveying 1822 teachers three times in many provinces and cities in all 3 regions of Vietnam: the North, the Central and the South, the researchers have classified the data according to the criteria from closed to open-ended questions. The results show a prominent level of interest (level 4/5) of all teachers participating in the survey, and there is no difference in the effectiveness in the three regions, but there is a clear difference in regions in using idioms and proverbs. Particularly, identifying situations to teach geometric and quantitative knowledge, as well as probability and statistics, allows one to apply idioms and proverbs at a high level. It is concluded that if idioms and proverbs from Vietnamese regions are appropriately selected and applied in teaching mathematics in primary schools, they will contribute to improving students' mathematical ability and preserving the national cultural heritage. Doi: 10.28991/ESJ-2022-SIED-015 Full Text: PDF

Vietnam is currently in the process of renovating the general educational curriculum, shifting from a content-based to a competency-based approach, with mathematical creativity as one of the core competencies. This paper aims to determine the correlations of perception, emotion, and behavior in sustainable development of mathematical creativity for primary school students in Vietnam. Analysis of 5th graders’ survey results in different regions in Vietnam (N = 903) shows that perception and emotion are highly correlated with the p-value Sig. (2-tailed) = 0.000 (<0.01); emotion and behavior are also correlated positively with the p-value Sig. (2-tailed) < 0.01, while perception and behavior also have a positive correlation with the p-value Sig. < 0.01. From the analysis, there are positive correlations of perception, emotion, and behavior, in which the role of emotion has the strongest effect on the process of teaching mathematical creativity for Vietnamese primary school students. At the same time, the analysis results show that there is no vast difference between students’ perception, emotion, and behavior amongst the urban, plain, and mountainous areas in Vietnam. The paper affirms the necessity to discover and strengthen students’ mathematical creativity from the primary school levels to equip human resources with essential competencies to face future obstacles in achieving sustainable development.   Received: 19 October 2021 / Accepted: 7 December 2021 / Published: 3 January 2022