In this essay review, we first historicize how the OECD (Organization for Economic Co-operation and Development) rose to be a global education policy actor and authority from a historical, comparative, and international perspective. Subsequently, we sketch out the global educational governing mechanisms developed by the OECD, which include but are not limited to governing by numbers, comparison, example, commensuration, affection, and "what works." Further, we summarize the main policy effects arising from the OECD's global education governance: economization of education, datafication, learnification, totally pedagogized society, and educational homogenization among different schooling systems. Finally, we discuss some alternative approaches to tackling the deleterious effects of the global educational governance.