The COVID-19 health crisis brought about transformations in education systems. In Chile, the ministerial authorities prioritized the school curriculum, stressing certain learning objectives over others. This paper seeks to uncover the social functions underlying curriculum prioritization for the subject of natural sciences. To do this, the functionalist approach to the sociology of education was adopted to analyse the prioritized curriculum for the subject in sixth grade elementary. Three dimensions were considered: (1) the principles of curriculum prioritization; (2) prioritized learning objectives; and (3) nonprioritized learning objectives. The presence of functions of creation (social consensus, social stratification, technical-modern development, human capital formation, and care for children and youths) was verified. As there has been no change in the curriculum that enables science education to address the current issues, the paper proposes that the social functions of science education should be resignified. Finally, examining the meritocracy and credentialism underlying the rationale for prioritization, the article finds that the social stratification attributed to education has increased rather than decreased.