This article reports on findings from a two-year project--'Improving Science Together'--undertaken in 20 primary and four secondary schools in and around Bristol, UK. The project was funded by the pharmaceutical company AstraZeneca PLC as part of their national Science Teaching Trust initiative, and had as one of its aims the development of cross-phase liaison between secondary school science departments and their feeder primary schools. Our findings suggest that, as a result of joint planning and implementation of a bridging unit, there had been an increase in the secondary school teachers' understanding of both the range of the science curriculum covered in primary schools and pupils' levels of attainment in the procedures of scientific enquiry. There was also evidence that transfer assessment information was informing planning and that pupils were experiencing greater continuity in their science education.