Fig. 1From: Embracing a culture of talk: STEM teachers’ engagement in small-group discussions about photovoltaicsTimeline of study procedures with data sources. Blue features of the timeline (e.g., arrows and text) represent aspects related to this study within the context of the larger RET program. The top half of the timeline represents measures and data collected, while the bottom half represents related program activities and topics. D = discussionBack to article page