Last Wednesday, the World Development Report 2018, Learning to Realize Education’s Promise (WDR) was released. It argues that there is a learning crisis: in many developing countries, children learn very little, educational opportunities are unequal, and educational progress is still very slow. What do we need to change this? We need prepared learners, who receive adequate nutrition and stimulation in their early years. We need well managed schools that create an environment conducive to learning. We need adequate inputs so that schools can operate effectively. But above all, we need motivated and well-prepared teachers. In classrooms around the world, white boards and screens have replaced black boards and notebooks are increasingly commonplace. But in this 21st century, with increased use of technology, there is one constant that determines, more than anything else, whether children learn at school: teachers. Indeed, teachers remain central to the classroom experience. And yet in many countries, the teaching profession needs attention and reform.