Biology Distinction by Design: Continuous Differentiated Pedagogy Across Four Malaysian SPM Cohorts (Kecemerlangan Biologi Melalui Reka Bentuk: Pedagogi Terbeza Berterusan Merentas Empat Kohort SPM Malaysia)

Abstract

Biology achievement in high-stakes examinations requires more than content coverage because learners must connect
concepts, interpret evidence, and produce precise scientific explanations. This action research examined whether
continuous differentiated Biology pedagogy was associated with achievement improvement across four Malaysian SPM
cohorts: Estelle 2023, Viatrix 2024, Gladius 2025, and Audrea 2026. The study used a retrospective quantitative design
involving anonymised aggregate examination records from Form 4, Form 5, Trial SPM SBP, and SPM. Grade
distributions, GPMP/GPK, pass rate, G-risk, A-band, and A-B band indicators were reconstructed and analysed using
descriptive statistics, chi-square redistribution tests, Cramer’s V, Friedman analysis, Kendall’s W, and trend diagnostics.
The strongest completed-cycle evidence appeared in the 2025 Gladius cohort, where G-risk declined from 43.15% to
0.00%, A-band representation increased from 1.37% to 57.82%, and GPK improved from 7.22 to 2.46. The completed
cohorts reached zero SPM failure, while Audrea 2026 showed favourable interim movement. The findings provide
practical implications for Biology panels by showing how evidence-informed differentiation can support early risk
detection, targeted remediation, and enrichment for higher achievement.