This study concerns the analyses of student performance, represented by subject grades and grade point averages from three bachelor's degree programs that are offered by the Department of Mechanical Engineering, Chulalongkorn University, Thailand. The studied population contains all former and current students who were admitted into a program from 2002 to 2008. It is shown that the grade averages of enrolled students significantly drop after the introduction of a new university admission system in 2006. However, the loss of top students may be contributed to the drop in popularity in the program selection at the end of the first year of study. The correlations between all compulsory courses and grade point averages can be used to help targeting specific areas for curriculum and course improvements for the programs with a large number of mixed-ability students only. Additionally, the final grade average was found to predominantly reflect the performances in lecture-based engineering courses.
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