In this article, we describe and reflect on a collaborative, school-based professional development project (an "intervention") intended to encourage innovation in classroom teaching. Specifically, the intervention included a collaboration between university-based researchers/mentors and primary school teachers in Singapore who were interested in discovering new strategies for reading comprehension instruction. The results show that by working together, over time, teachers were able to innovate by adopting new strategies for leading reading comprehension discussions and adapting the new strategies to fit the local teaching context. Crucially, the innovation found that "learning" the new strategies was insufficient; teachers needed professional support from the teacher trainers and their collaborating colleagues as well as time--over three years--to develop their expertise and their confidence in the implementation of the new strategies.