The development of Mathematical Competencies is essential to academic success and real world problem solving. However many secondary school students struggle with foundational mathematical skills leading to poor performance in the subject. This study aims to identify specific gaps in Mathematical Competencies among secondary school students using Diagnostic Testing and Error Analysis. A sample of 40 students from standard IX and X were assessed using a competency-based diagnostic test aligned with curriculum standards. Detailed error analysis was conducted to uncover the patterns of misconceptions, procedures, lapses, conceptual weaknesses etc. The results revealed consistent deficiencies in number operations, algebraic manipulations, geometric reasoning and problem solving strategies. Based on the findings, remedial strategies and instructional adjustments are proposed to address the specified gaps.
Đurić et al. (Mon,) studied this question.