Resumen
The benefits of STEM education for learning important knowledge, skills, and affect are widely accepted, though the former is currently absent in Singapore?s formal curriculum. This study therefore describes a model-integrated STEM curriculum at the middle-school level for developing scientific as well engineering literacy. Based on design-based inquiry (DBI), it incorporated inquiry science learning with an engineering design challenge for students to build improvised microbial fuel cells (MFC). Co-planned with science teachers from various disciplines, the curriculum was implemented as a 10-week enrichment program with two groups of Grade 8 students (N = 77) from one secondary school in Singapore. Through the use of vignettes, we show how learning about/of science and engineering occurred in the conceptual, epistemic, and social domains. In addition, students applied evidence-based reasoning, various epistemic skills, and a variety of problem-solving approaches as they iteratively improved their MFC set-ups, which often outperformed commercial kits. This proof-of-concept case study represents the first successful implementation of a STEM-integrated curriculum for middle-school students and can serve as a model for the development of similar programs elsewhere.