This paper uses questionnaire data to examine the impact of the national cu
rriculum on secondary school science teachers' work in England and Wales. W
hile many of the changes might have been anticipated, others are surprising
and a cause for concern. The evidence suggests that, in a significant numb
er of schools, less time is being spent upon practical activities in the la
boratory and pupils are presented with a narrower range of laboratory activ
ities. In addition, a substantial proportion of teachers judge national cur
riculum science to be insufficiently flexible to allow them to meet the nee
ds of all their pupils and provide them with an enjoyable scientific educat
ion.