EXAMINING THE IMPACT OF CLASSROOM POPULATION DENSITY ON PUPILS' LEARNING OUTCOMES

this study investigates the impact of overcrowded classrooms on pupils’ academic performance in public primary schools within Morogoro Municipality, Tanzania. Using a mixed-methods approach and a case study design, the research combined both probability and non-probability sampling techniques to select a representative sample of 350 participants. Data collection tools included questionnaires, interviews, classroom observations, and document analysis. Quantitative data were analyzed using SPSS Version 20, while qualitative data were subjected to thematic analysis.The results reveal that classroom sizes in the municipality significantly exceed the national standard ratio of 1 teacher to 45 pupils. This level of overcrowding negatively affects pupils’ cognitive, affective, and psychomotor domains of learning, with affective performance (including motivation, attitude, and emotional engagement) being the most adversely impacted. Pupils in overcrowded classrooms were found to experience reduced individual attention, limited opportunities for active participation, and increased classroom management challenges, all of which compromise learning effectiveness.The study concludes that overcrowded learning environments present a critical barrier to achieving quality education. It recommends urgent interventions such as the construction of more classrooms, recruitment of additional teachers, and the integration of ICT-based teaching methods to manage large classes effectively. The findings offer valuable insights for education policymakers, school administrators, and stakeholders seeking to improve learning conditions and enhance pupil outcomes in resource-constrained public schools.