This study examined the structural, pedagogical, and socio-contextual barriers that prevent the replication of historical formal schooling models within contemporary classroom environments. Grounded in critical pedagogy theory, social constructivism, and systems theory, the study investigated the degree to which adherence to historical instructional models contributes to pedagogical inefficacy, diminished student outcomes, and reduced classroom adaptability in modern educational settings. A cross-sectional mixed-methods design was employed, with data collected from 420 inservice teachers and 1,260 students drawn from five categories of schools across urban, peri-urban, and rural contexts. Quantitative data were analyzed using univariate descriptive statistics, bivariate correlation and independent samples t-tests, and full-information structural equation modelling (SEM) using a two-step Anderson-Gerbing approach. Findings revealed statistically significant discrepancies between historical pedagogical alignment scores and contemporary classroom demands across all school types, with international schools recording the highest contemporary demand scores (M = 4.83, SD = 0.71) and traditional public schools the lowest adaptability (M = 2.91, SD = 0.64). Bivariate analysis confirmed significant negative correlations between historical model adherence and student outcomes (r = −0.51, p < .001) and classroom adaptability (r = −0.44, p < .001). The SEM path model demonstrated satisfactory fit (CFI = 0.96, RMSEA = 0.048) and revealed that historical model adherence (β = 0.52, p < .001) and teacher resistance (β = 0.39, p < .001) were the strongest predictors of pedagogical inefficacy, which in turn significantly suppressed student outcomes (β = −0.47, p < .001) and classroom adaptability (β = −0.44, p < .001). The study concluded that historical schooling models, while foundationally significant, are structurally and epistemologically incompatible with the demands of contemporary classrooms characterized by diversity, technology integration, and student-centred learning. Recommendations included mandatory pedagogical retooling programmes for in-service teachers, policy reforms embedding adaptive instructional frameworks, and context-sensitive curriculum redesign.