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PurposeThis study aims to investigate the effects of leadership competences (cognitive, interpersonal, and results-oriented competences) on organizational learning, organizational innovation, and business performance.Design/methodology/approachData were collected from owners, chief executive officers, top and middle management teams, and other managers of tourism and hospitality firms in Vietnam. A total of 638 valid responses was collected and processed using PLS-SEM technique.FindingsThe findings revealed that only results-oriented competence exerted significant influences on business performance. Organizational learning was affected by all three leadership competences, while only cognitive and interpersonal competences positively affected organizational innovation. The relationships among organizational learning, organizational innovation, and business performance were also confirmed. Moreover, the findings emphasized the mediating roles of organizational learning and organizational innovation in the relationship between leadership competences and business performance. Organizational learning and organizational innovation also acted as a mediator in the relationship between cognitive competence and business performance.Practical implicationsThis study provided some suggestions for tourism and hospitality leaders in exhibiting appropriate leadership competences, strengthening organizational learning, and fostering organization innovation to enhance business performance.Originality/valueAlthough the topics of leadership competences, organizational learning, organization innovation, and business performance have received a great concern among worldwide academia, there is scarce research examining the relationships among these four phenomena together. This paper is among the first study that offers a comprehensive model of the relationships among these domains.

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