Purpose This paper aims to report findings for the following question, “What is the nature of high school students’ identity exploration as a result of exploring the role-possible selves of an environmental scientist and urban planner in a play-based course?” Projective reflection (PR) is served as a theoretical and methodological framework for facilitating learning as identity exploration in play-based environments. Design/methodology/approach From 2016-2017, 54 high school freshmen students engaged in virtual city planning, an iteratively refined course that provided systematic and personally relevant opportunities for play, curricular, reflection and discussion activities in Philadelphia Land Science, a virtual learning environment (VLE) and in an associated curriculum enacted in a science museum classroom. Participants’ identity exploration was anchored in targeted role-possible selves in science, technology, engineering and mathematics: environmental science and urban planning through in-game and in-class activities. This role-playing was made intentional by scaffolding students’ reflection on what they wanted to be in the future while thinking of their current selves and exploring novel role-possible selves. Findings In-game logged data and in-class student data were examined using quantitative ethnography (QE) techniques such as epistemic network analysis. Whole-group statistical significance and an illustrative case study revealed visual and interpretive patterns of change in students’ identity exploration. The change was reflected in their knowledge, interest and valuing, self-organization and self-control and self-perception and self-definition (KIVSSSS) in relation to the roles explored from the start of the intervention (starting self), during (exploring role-possible selves) and the end (new self). The paper concludes with directions to advance research on leveraging role-playing as a mechanism for fostering identity exploration in play-based digital and non-digital environments. Originality/value This paper leveraged VLEs such as games as forms of play-based environments that can present players with opportunities for self-transformation (Foster, 2014) and enculturation (Gee 2003; Shaffer, 2006) to support learner agency and participation in a constantly changing society (Thomas and Brown 2011). The authors introduce and apply novel theoretical and methodological approaches to the design and assessment of play-based environments and address pertinent gaps in the emergent area of learning and identity in VLEs

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