Performatiwiteit en die hedendaagse skool(hoof)

Performativity and the modern school (principal) Based on observations in the field of education management science, including the results of a recent empirical survey, we concluded that schools and their principals have become inundated with the demands for performativity, i.e. the demand to achieve in measurable terms as well as submit to the cult of efficiency and effectiveness. After briefly considering recent developments and changes in schools and in the work of school principals, we refer to the findings of the empirical survey. This is followed by a discussion of three key objections to performativity in schools and in the work of principals, namely the reductionism that it presupposes, its non-pedagogical tendencies and its negative effects on the school as a societal relationship. The discussion is conducted within a Christian-reformational frame of reference

Role of hydrocarbons in egg recognition in the honeybee

Despite worker-laid and queen-laid honeybee eggs having significantly different hydrocarbon profiles, bioassays and chemical supplementation studies show that changing the hydrocarbon profile does not affect egg identity. Furthermore, full-sized eggs that are tested just before being laid or just after being laid have similar hydrocarbon patterns but are treated differently in egg-discrimination bioassays with only the laid eggs surviving. This suggests that hydrocarbons play no role in the egg-recognition system in honeybees