STEM education reform plays a critical role in modern education for the country to keep abreast of being competitive in global economy. For a long time, STEM disciplines have been in silos, rendering the students unable to connect learned knowledge with real life problems. The emergence of integrated STEM education in some institutions suggests that, this approach makes students better problem solvers and logical thinkers. This paper provided an overview of what teaching strategies dominate in the implementation of integrated STEM education. The research methodology was based on a review of relevant literature search strategy through ERIC, online databases and journals such as Science Direct, Wiley Online Library, Taylor & Francis Online, SpringerLink, IEEE Xplore Digital Library, JSTOR and Journal of STEM Education. The keywords used in the search included integration strategies, science and technology, teaching and learning STEM, STEM in primary school, STEM in secondary school and STEM in higher education. The results of this meta-analysis revealed that, a project-based learning approach is the dominant strategy in STEM education implementation as this method improves the students' skills and their capability to compete with others in the highly knowledge-based society. Findings from this review will lead educators who are new to STEM education to investigate further on how project-based learning could be effectively implemented in their teaching.

Fuel price crisis has caused people to demand a car that is having a low fuel consumption without compromising the engine performance. Designing a naturally aspirated engine which can enhance engine performance and fuel efficiency requires optimisation processes on air intake system components. Hence, this study intends to carry out the optimisation process on the air intake system and airbox geometry. The parameters that have high influence on the design of an airbox geometry was determined by using AVL Boost software which simulated the automobile engine. The optimisation of the parameters was done by using Design Expert which adopted the Box-Behnken analysis technique. The result that was obtained from the study are optimised diameter of inlet/snorkel, volume of airbox, diameter of throttle body and length of intake runner are 81.07 mm, 1.04 L, 44.63 mm and 425 mm, respectively. By using these parameters values, the maximum engine performance and minimum fuel consumption are 93.3732 Nm and 21.3695×10-4 kg/s, respectively. This study has fully accomplished its aim to determine the significant parameters that influenced the performance of airbox and optimised the parameters so that a high engine performance and fuel efficiency can be produced. The success of this study can contribute to a better design of an airbox.

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