Mixed methods, mixed outcomes? Combining an RCT and case studies to research the impact of a training programme for primary school science teachers

A randomised controlled trial (RCT) and a series of case studies were used to determine the impact of two variants of an intervention (a professional development programme) aimed at improving primary school science teachers’ subject and pedagogic content knowledge, and enhancing their subject leadership ability. Ninety-six schools were randomly assigned to full or partial treatment groups or a ‘business-as-usual’ control group. Quantitative data...