In this study, we examined four preschool teachers’ reflections on their science teaching exhibited through a four-session science professional development (PD) experience. In the PD sessions, teachers reflected with a facilitator on video clips of their interactions with children as well as children’s interactions with science materials; and were provided additional resources that might enhance their reflection. In addition, we investigated change in teachers’ attitudes toward teaching young children science before and after the PD experiences. (author abstract)