During the expo, teachers and senior students from each NSS elective subject showed their notes, exam papers to S.3 students so that the students would know more about the subjects. 

S.3 students were also required to ask teachers and senior students at least three questions about the teaching syllabus, subject content, SBA requirements and the style of the exam papers etc. 

With all this information, S.3 students can make a well-informed and wise decision about choosing their elective subjects.