“LEVERAGING SYSTEMS ANALYSIS STRATEGIES (SAS) FOSTER MATHEMATICS ACHIEVEMENT IN POST-PRIMARY EDUCATION (PPE): A BACKGROUND STUDY OF CROSS RIVER STATE, NIGERIA”. International Journal of Functional Research in Arts and Humanities (IJFRAH) , vol. 4, no. 2, June 2025, pp. 193-00, https://ijfrah.com/journal/article/view/75.