Ed tech is profitable. It is also mostly useless

After a decade of "1-to-1" device rollouts and billions of dollars in spending, independent research is confirming what parents and teachers have felt for years: technology in the classroom often impairs learning. The Economist features Emily Cherkin’s call for a radical reallocation of resources-away from extractive tech platforms and back into the hands of the most transformative tool in the classroom: the teacher.