Assessing Pre-Service Science Teachers’ Understanding of Global Warming through the Content Representation (CoRe) Instrument

This study evaluates pre-service science teachers’ conceptual understanding of global warming using the Content Representation (CoRe) instrument. A descriptive design was employed with purposive sampling of second-year science education students. Data were gathered through eight CoRe prompts eliciting essential concepts, rationales, instructional sequencing, student considerations, decision factors, assessment strategies, and anticipated challenges. Responses were scored with a four-level rubric to derive profiles of strengths and weaknesses. Findings indicate overall understanding at a medium yet tending-to-low level; participants could identify core ideas and justify relevance, but struggled to organize coherent conceptual sequences, connect student context to instructional decisions, and articulate specific indicators of understanding. These results underscore the need to strengthen mechanism-based content knowledge, assessment literacy for conceptual understanding, and evidence-informed practice through microteaching and data-analysis tasks. The study recommends integrating CoRe as a structured reflection tool within teacher education curricula.