This paper reports on research into how effective non-statutory guidance has been in managing the primary science curriculum in England. A small-scale qualitative study was used to elicit the views of teachers, local education authority advisors, an Ofsted inspector and a policy-maker. The findings indicate that the guidance is influencing the management of primary science teaching at both national and local level. The use of this guidance has been supported nationally and individual schools have found it supportive. The effect of this policy on pupil learning has still to be investigated by further classroom observational studies. It is also hypothesised that the long-term effect of this guidance could be stagnation and a lack of creativity and this needs further study. Has this guidance reached the end of its useful life? Does it need replacing or are primary science teachers now in a position of not needing such support?