“…With the benefit of hindsight, of course, this should come as no surprise given the generally low status of primary science relative to other subject areas reported earlier in the National Primary Survey of Schools (DES 1978) and work of the Assessment of Performance Unit (DES/WO/DENI 1988) and the simple and obvious fact that most practitioners working with the National Curriculum for the first time had little experience of science beyond what they themselves had encountered at school. With a 'tool kit' of sometimes highly specialised professional knowledge and skills increasingly in demand, addressing and acquiring curricular expertise in science has always proved somewhat problematic, particularly for the 'generalist' primary teacher (Sorsby and Watson 1993), often resulting in the almost unavoidable adoption of coping strategies not all of which could be considered productive (Summers 1994;Harlen and Holroyd 1997;Newton and Newton 2000;Pine et al 2001). A lasting solution through pre-service and in-service education and training and continuous professional development has always remained somewhat elusive (Kruger et al 1990;Kinder and Harland 1991;Summers and Kruger 1994;Smith 1999; Teachers' limited subject knowledge of science in particular was quickly identified as a major factor adversely impacting on 'delivery ' (planning, teaching, differentiation and assessment) as well as confidence in the classroom and ultimately the range and quality of children's learning experiences (Russell et al 1992;Summers 1992;Holroyd and Harlen 1996;Osborne and Simon 1996) and subject knowledge subsequently received considerable attention.…”