To meet the demands of the twenty-first century, teachers of citizenship and social studies are tasked with educating students about histories that are not visible in traditional, linear, universal capital-H "History" -- the history found in the educational curriculum, textbooks, media culture and, often, museums. These narratives…

Although teachers' instruction has been extensively studied, there is a dearth of research investigating how teachers design lessons and integrate new information into their existing lessons. This study utilized a case study approach to examine how teachers engaged in a nanoscale science professional development experience integrated new science…