The main goal of this study was to examine the Environmental Workshop unit taught to Environmental Sciences majors in the high schools in Israel and learn if, and in what ways, this unit could become a model for environmental education throughout the high school curriculum. We studied the special characteristics of the Environmental Workshop (EW) unit, which is based on inquiry-based learning that takes place in and out of school, and includes an environmental action component as well. We describe three approaches to the EW we identified. After identifying teachers' challenges in assessing their students, in addition to the phenomenographic study, we suggest and demonstrate assessing the EW students by relevant socio-scientific issues. Finally, we argue that the EW could be incorporated in the junior as well as the high school curriculum as a coherent unit that is in line with environmental education in its broader sense.