Journal of Management Information and Decision Sciences Volume 22, Issue 4, 2019 444 1532-5806-22-4-162 Citation Information: Hau, N. H., Tuan, B. A., Thao, T. T. T., & Wong, W-K. (2019). Teaching mathematics by practical decision modeling in Vietnam high schools to serve the fourth industrial revolution. Journal of Management Information and Decision Sciences, 22(4), 444-461. TEACHING MATHEMATICS BY PRACTICAL DECISION MODELING IN VIETNAM HIGH SCHOOLS TO SERVE THE FOURTH INDUSTRIAL REVOLUTION Nguyen Huu Hau*, Hong Duc University Bui Anh Tuan, Can Tho University Tran Thi Thu Thao, Can Tho University Wing-Keung Wong, Asia University; China Medical University Hospital; The Hang Seng University of Hong Kong ABSTRACT The fourth industrial revolution has affected most economies in the world. From a social perspective, the absence of theoretical models that drive decisions has a big impact on economic development, especially in developing countries. In these models, the Decision model plays a particularly important role because it is a bridge between economics and social sustainability through education. This paper presents an illustration of the Programme for International Student Assessment (PISA -oriented decision model that links real-life situations and models of mathematical theory in high schools to provide a new way of looking at the approach of decision sciences. Keywords: Decision Modeling, Decision Sciences, Real-world Problems, PISA INTRODUCTION In developing countries, modeling real situations is a requirement during the fourth industrial revolution. According to Islam et al. (2018), the absence of practical research and technology application is a major obstacle for developing countries like Bangladesh or Vietnam that can adapt in the context of the knowledge economy. Hence, modeling real-world situations is a way to be concerned in developing countries. Therefore, which model and how should sustainability be modeled in society? According to Chang et al. (2017), the development of linked theoretical models in the fields of information management, decision science and financial economics is a promising development. These models can also be strengthened through teaching students at high schools to shape future generations of citizens serving the 4.0 industrial age. It is possible to build many models for teaching; however popular models, which are widely used, can be mentioned as decision models in Mathematics, STEMTech models for Natural Sciences subjects (Tuan et al., 2019a), etc. Decision modeling is derived from the idea of Realistic Mathematics Education (RME), a theory of teaching and learning Practical Mathematics comes from the Netherlands. According to Freudenthal (1968), Mathematics educators have brought up numerous problems related to modeling by asking questions "Why to teach Mathematics so as to be useful? Why can't several students utilize Mathematics knowledge learned to solve real problems even though they have achieved excellent certification in this subject? Mathematics is taught so that students can apply Mathematics to simple situations of life". In the middle 1970s, Decision modeling is still continued to be mentioned by Ang (2001), Deutschland et al. (2004), Blum et al. (2007), Aris (2012), Bourne (2018), Burger et al. (2018), Caccavo et al. (2018), Shorten et al. (2018), Gazi (2019), Khan et al. (2019), Mahmoudi et al. (2019), Pho et al. (2019a, b, c) and Tuan et al. (2019b), etc.