The growing use of the interactive whiteboard (IWB) in primary school teaching forms part of a number of initiatives within the schools of the United Kingdom to develop the use of information and communications technology (ICT) in teaching and learning. The IWB presents both challenges and opportunities to teachers, particularly in terms of staff development and training. This study uses classroom observation and semi-structured interviews with teachers now working in a recently built, technology-rich primary school to develop a generic progressive framework and developmental model for schools introducing the IWB. This framework can be used to assess and guide teacher progress on the continuum towards becoming a "synergistic user". As teachers make this transition there is a fundamental requirement to adopt an interactive teaching style, alongside the gradual development of specific ICT skills. The study also examines implications for teacher education and training for schools, both prior and subsequent to the introduction of the IWB into classroom use. These include specific technical and pedagogical competencies which need to be addressed for effective interactive use of the IWB in classroom teaching. (Contains 3 notes and 5 figures.)