Age-classes are a salient feature of modern schooling. Yet how did age-grouping come to prevail in entire school systems? And how was this form of grouping related to educational and pedagogic discussions at the time of its emergence? The article addresses these issues by looking at the historical context within which age classes came to a…

This paper provides a detailed analysis of the inclusion of aspects of nature of science (NOS) in the "Next Generation Science Standards" (NGSS). In this new standards document, NOS elements in eight categories are discussed in Appendix H along with illustrative statements (called exemplars). Many, but not all, of these exemplars are…

This study examined 328 preservice educators' level of confidence in addressing four sexuality education domains and 21 sexuality education topics. Significant differences in confidence levels across the four domains were found for gender, academic major, sexuality education philosophy, and sexuality education knowledge. Preservice educators…