Background: This dissertation examines the pervasive influence of the white and colonial imaginary in shaping educational narratives that promote neoliberal success and capitalism, impacting the minds of successive generations. Contemporary youth perceive these narratives as detrimental, contributing to racial violence, climate-induced displacement, and ecological degradation. The growing disillusionment among young people calls for a shift towards cultivating authentic, responsible, and reciprocal narratives prioritizing critical eco-relational significance and fostering sustainable futures (Fowler, 2023; Vamvalis, 2022; Han, 2022; Whyte, 2018). The design research shared in this dissertation not only illuminates the intricate eco-relational brilliance and radical care exhibited by some of our youngest geologists, engineers, scientists, and critically conscious citizens, but it also unveils liberatory trajectories for teacher (un)learning and pedagogical commitments associated with anti-racist and anti-colonial approaches to science education. This work serves as an offering and an encouragement to embrace boldness, bravery, and a committed rogue approach against racism and coloniality in education. Methods: The dissertation employs Design-Based Implementation Research (DBIR) (Penuel et al., 2011), guided by social practice theory (Bell et al., 2012; Lave & Wenger, 1991), and an In-relations methodological practice (Tachine & Nicolazzo, 2023) animated by Indigenous eco-critical and critical race theory. The collaborative design research was conducted within a network of elementary school, kindergarten to sixth grade educators across a suburban school district. Educators participated in a 15-month professional development initiative designed in accordance with the Social Focus Framework (Sanchez, 2024) to build capacity for anti-racist and anti-colonial education. This involved a network of teachers participating in critical learning as a collective and in grade-level teams involved in co-designing curriculum and iterative implementation. Ethnographic, artifact-based, and interview data was analyzed through critical ethnographic methods involving participant-observation, interpretive analysis and coding of student and teacher artifacts and teacher interviews, and theory-driven focused coding of student interaction. Findings: The dissertation is structured into three papers, each addressing different aspects of the research. In Paper 1 (Chapter 2), I document the diverse learning pathways of elementary teachers engaged in anti-racist and anti-colonial education. The findings reveal that teachers' engagement in sensemaking, critical meaning-making and situated actions varied significantly, influenced by dimensions of whiteness such as innocence, ignorance, saviorism, and arrogance. Teachers who adopted a "rogue settler diligence" approach showed significant progress in anti-racist and anti-colonial teaching practices, highlighting the developmental nature of critical teacher learning. In Paper 2 (Chapter 3), I present a case study focused on a second-grade student who exemplifies the potential for young learners to engage in eco-relational caring practices during a geology unit. The student's end-of-unit presentation underscores the importance of nurturing relational epistemologies (Bang et al., 2018) to support speculative (re)worlding in socio-ecologically precarious times. In Paper 3 (Chapter 4), I follow third-grade students prioritizing multispecies justice, anti-racism, and anti-coloniality in a science unit. The students' development of just worlding engineering design principles illustrates their capacity to envision and advocate for radically caring and sustainable futures. Contributions: The dissertation offers several design principles for transforming education, as well as fields of science and engineering: (1) Teacher (Un)Learning Pathways Towards Antiracist and Anticolonial Science Education: Analysis of teacher learning pathways highlights the developmental nature of critical teacher learning, emphasizing the need for sustained, reflexive, and rigorous professional development to counter white supremacy and coloniality; (2) Honoring Kindred Relationality as Design Priority: Prioritizing relationality in curriculum design fosters radically caring approaches in science and engineering education, aligning with children's inherent eco-relational perspectives; (3) Critical Liberatory Presencing of Multispecies, LandAirWaterStars, and Rights of Nature: Integrating diverse ecological perspectives disrupts human supremacy narratives, promoting interdependent thriving; (4) Transparency and Humility as Valued Design Stance: Emphasizing transparency and ethical curiosity in scientific inquiry challenges traditional power dynamics, fostering a more inclusive and collaborative scientific community; and (5) Resistance and Refusal as Valued Design Practice: Encouraging children's principled resistance and refusal to harmful actions cultivates liberatory learning environments and responsible, ethical STEM education. Overall, the research highlights the potential of young learners to contribute to a more equitable and sustainable world and offers insights into how district-level initiatives can support such transformative educational practices. This dissertation ultimately affirms the crucial role of education in shaping a just and caring future, guided by the eco-relational brilliance and radical care of young learners. The work shows that this was only possible across a school district through a sustained, coherent, and critical approach to shared teacher learning and support of situated actions related to instructional practice that enacted anti-racist and anti-colonial approaches. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]