This Guide is designed to help leaders and practitioners of technical and vocational education and training (TVET) in improving their understanding and implementation of education for sustainable development (ESD) using a whole-institution approach to greening their institutions. The Guide reflects the objective of the UNESCO-UNEVOC International Centre for TVET to assist TVET institutions in their journey towards transformation. This is consistent with its advocacy since 2011 of initiating reforms that meet the twin challenges of youth unemployment and low capacities in the field of sustainability across the TVET sector. These reforms should be based on holistic and coherent transformations of institutions, rather than broken paths to institutional change that are lacking in long-term vision.