To understand the complexity of designing and developing a S&T curriculum, we chose a grounded theory approach in which several sensitising concepts from literature on teacher collaboration were used (Bowen 2006). For example, we looked at the level of transparency in how teachers talk about their own teaching practice; how specific and complete are these exchanges (Horn and Kane 2012; Levine and Marcus 2010). Also, the level of interdependency was used as a sensitising concept (Little 1990). As a first step in the analysis, two researchers (authors of this article) wrote summaries of the five meetings, including the topics discussed and the ways in which teachers interacted (exchanging ideas, discussion, etc., and after that also how they reacted to each other: supportive, critical, etc.). Next, they discussed the summaries of the meetings in order to formulate an understanding of how the team collaborated in the design and development of a school-based curriculum for S&T education, and what can be considered as promoting and constraining factors.