This report -- commissioned by the Commonwealth of Learning (COL) -- provides an overview of research into good practice in blended learning in technical and vocational education and training (TVET) and the competencies teachers need to teach in digital learning environments. It provides background for the development of digital competency standards for teachers to deliver blended TVET in Commonwealth countries in sub-Saharan Africa, Asia, and the Caribbean, as well as an accompanying toolkit for teacher-trainers. The research also provides an overview of the digital infrastructure and support systems TVET institutes need to implement blended delivery as well as some ways these can be developed in low-technology settings.