I'll know our job is done when Pisa is superfluous, says 'world's schoolmaster'.

The article focuses on views of Andreas Schleicher, the director for education and skills at the Organization for Economic Cooperation and Development (OECD), on global education, as of December 2016. Topics include significance of Programme for International Student Assessment (Pisa), which ranks the world's education systems in science, reading and maths; potential role of Pisa as a tool for development; and the said superiority of education systems.