Purpose: The explanatory study aimed to understand the global perspective of quality education and describe transformative strategies that empower teacher educators and equip the education system and future teachers to act as change agents by fostering learning processes that support students towards a sustainable future. Design/methodology/approach: The explanatory study used a descriptive qualitative design. The researchers conducted four semi-structured group interviews of the 23 participants including pre- and in-service teachers, teacher educators, and policymakers from Austria, Germany, Italy, Canada, the United States, and South Africa during the Teach4Reach 1.0 project on SDG4. The inductive thematic analysis of the data was guided by Kuckartz's six-phase approach for constructing data-driven categories. Findings: The study identified SDG4 as pivotal in supporting the overall UN Agenda 2030. Furthermore, three distinct themes unequivocally emerged and were developed concerning the imperative nature of envisioning transformation for sustainability: (1) collaboration, (2) well-being and context of individuals, and (3) strategies for skill development. Research limitations/implications: Due to the qualitative nature of the study, the participants' comprehensive understanding of the SDGs and their perceptions remained conditional to methodological subjectivity. Practical implications: The study enabled a dialogue between educational stakeholders (pre- and in-service teachers, teacher educators, and policymakers), whereby an awareness and encouragement of SDG4 regarding quality education and training of quality future teachers occurred. A further implication includes increased collaboration and dialogue regarding the well-being of individuals (educational stakeholders), the context of individuals, and strategies for skill development. Originality/value: The study elaborates on reaching the SDGs and identifies themes essential for sustainability transformation in teacher education. It also highlights further research and clarity about the responsibilities of educational stakeholders for quality education, for instance, (1) how to increase the supply of quality teachers by focusing on collaboration, well-being, and the contexts of individuals and (2) how value-embedded skills can support quality education for sustainability.