Abstract: Energy literacy, which encompasses broad content knowledge as well as affective and behavioral characteristics, will empower people to make appropriate energy-related choices and embrace changes in the way we harness and consume energy. Energy literacy was measured with a written questionnaire completed by 3708 secondary students in New York State, USA. Results indicate that students are concerned about energy problems (affective subscale In this program and practices feature, we describe two different models of teacher professional development designed to help teachers build their own energy literacy while gaining tools to bring energy literacy to their classrooms. Through a review of the literature we identify principles by which to compare and evaluate the two approaches. Both were successful in helping teachers to build energy literacy; each had a mix of advantages and disadvantages when compared to the literature. [ABSTRACT FROM AUTHOR]