Schools across the country have invested billions of dollars in tablets, laptops, and high-speed internet with the expectation that more technology means better learning. But what does the research actually show? A large body of evidence demonstrates that the issue is nuanced, with more downsides to technology use than most people expect. Take, for example, an international study conducted by the Organization for Economic Co-operation and Development (OCED). In it, researchers examined standardized testing data from 15-year-olds across dozens of countries. They found that students who used technology the most in school tended to perform worse on assessments than those who used it moderately. Students in East Asian nations — where schools intentionally limit technology use and favor traditional instruction, particularly in math — consistently performed better on math assessments. A similar assessment conducted by the Reboot Foundation, an educational organization based in France, analyzed data from across the globe. One data set was from the 2017 National Assessment of Educational Progress, a nationally-representative assessment of student knowledge in the U.S. It looked at Wisconsin …