Abstract: This is the final article on the performance of Singapore’ s population 1 students in the Third International Mathematics and Science Study (TIMMS) Students’ performance on Data Representation, Analysis and Probability and Patterns, Relation and Functions show some clear trends. They are: (1) Primary four (Upper grade) students outperform primary three (Lower grade) students: (2) Singapore’s population 1, i.e. primary school, students out perform their corresponding International cohort: (3) Girls outperform boys on Data Representation Analysis and Probability, but the results are mixed for Patterns, Relations and Functions: and (4) Boys tend to leave questions blank more often than girls.

Finally, the analysis of the data from all the topics shows that students perform well in routine situations. They have difficulty comprehending concepts or applying information in non-familiar contexts and the school curriculum operates as an upper limit on the mathematics they lean, Activities that address these difficulties need to be integral part of the school curriculum.