Research into the construct of science teacher identity has gained momentum over the past decade in an effort to achieve a more comprehensive, holistic understanding of teacher learning and development. As yet few studies have examined the unique identity challenges of science teacher career changers. A dialogical approach to the conceptualization…

There is much agreement among chemical education researchers that expertise in chemistry depends in part on the ability to coordinate understanding of phenomena on three levels: macroscopic (observable), sub-microscopic (atoms, molecules, and ions) and symbolic (chemical equations, graphs, etc.). We hypothesize this "level-coordination…