The aim of this theoretical paper is to develop and present a didaktik model that embeds chemistry education into Environmental and Sustainability Education (ESE) using an eco-reflexive approach. A didaktik model is a tool to help educators make decisions and reflect on why, what, how, and/or when to teach. The model presented here is a revised version of the Jegstad and Sinnes model from 2015. It was systematically developed based on a critical analysis of the previous ESD (Education for Sustainable Development)-based model. This process is part of what is called didactic modeling. The revised model consists of the following six categories: (i) socio-philosophical framing; (ii) sustainable schooling and living; (iii) critical views on chemistry's distinctiveness and methodological character; (iv) powerful chemical content knowledge; (v) critical views of chemistry in society; and (vi) eco-reflexivity through environmental and sustainability education. As in the model by Jegstad and Sinnes, the eco-reflexive didaktik model seeks to support chemistry educators in their sustainability-oriented educational planning and analysis, but from a more critical perspective. Based on an eco-reflexive Bildung approach, one additional category-socio-philosophical framing-was added to the revised model. This is because the previous model does not take sufficient account of worldview perspectives, cultural values, and educational philosophy. The eco-reflexive didaktik model is illustrated with boxes, and it is suggested that all categories in these boxes should be considered in holistic and eco-reflexive chemistry education. The purpose of such education is to develop students' ChemoKnowings.

In this article, we elaborate on the construct ChemoKnowings as subject-specific powerful knowings for chemical agency in the Anthropocene era. Related to constructs such as critical chemical literacy, ChemoCapabilities, and eco-reflexive chemical thinking, we unpack the construct as an example of Carlgren’s powerful knowings, which relates Young’s powerful knowledge to the idea and tradition of Bildung. It means powerful knowledge containing embodied and relational (or tacit) dimensions. ChemoKnowings can therefore be described as embodied and relational knowledge in and about chemistry – (critical) chemical knowledge that matters meaningfully to the student, connecting them to themselves and the world, and conferring an ethical compass. By situating the teaching of ChemoKnowings within a vision for chemistry teaching as a part of a world-centered vision for schooling in the Anthropocene, ChemoKnowings are viewed as having the capacity to mobilise an ethico-socio-political action, that is, chemical agency. By focusing on student transformation of content for ChemoKnowings and integrating elements of a theoretical didaktik model for eco-reflexive chemistry education, we develop a vision-oriented didaktik model for ChemoKnowings. More generally, we argue that didaktik models for supporting teachers’ consideration of student transformation of content for powerful subject-knowings are an important part of general subject didaktik. We present in the article vignettes that detail personal accounts for each of the three authors describing examples of chemistry-specific knowings that matter meaningfully to each of us, and which articulate our own embodied ethico-socio-political actions as students, teachers, researchers, and consumers. Inspired by Klafki’s didaktik analysis, we end the article by proposing four areas of questions that the teacher can use in guiding their preparation and transformation of the content they bring into the classroom for promoting students’ ChemoKnowings, and thus Bildung in the 21st century.

In the Anthropocene, there is a significant need for new ways to educate about science and environmental problems, including climate issues. This article explores Swedish teacher students' discussions as they envision their future roles as science teachers in the light of the Anthropocene. At the beginning of their science teacher education, the teacher students are not fully immersed in the established discourses of the educational system as in-service teachers. In this study, we consider how these teacher students' 'fresh eyes' bring views of how knowledge (especially chemistry-related knowledge) matters in education and teaching. Through a lecture that centred planetary boundaries and the Great Acceleration as representations of some main scientific models in the field, the teacher students were introduced to the concept of Anthropocene. Five focus group discussions followed this introduction. Thematic analysis reveals how the acquired knowledge of the introductory lesson challenges the students to express 'matters of concern' differently: partly considering a personal, everyday level and partly reformulating their role as future science teachers. The interrelation of these positions is also a concern for the concluding discussion. Furthermore, the article discusses these results as both concerns and possibilities for science education, including science teacher education.