This paper reports findings about the impact of departmental characteristics on secondary science teachers' work. It is drawn from a larger study, which also looked at ideological and material influences on practice. It focuses particularly on those aspects of the departmental environment which teachers themselves referred to frequently when discussing their work. These were: the managerial style of the department; the use made of schemes of work; the emphasis on the science disciplines as compared with 'science'; and the characteristics of pupils. It argues that such departmental characteristics are sometimes symbiotic, and that they are most subtly characterized in mainstream comprehensive schools. It also suggests that, while these influences do not necessarily lead to variation in the broad forms of pedagogy employed, they are perceived by teachers as significantly influencing their professional working environment, and the experience of teaching science.