Does Computer Use Hurt Learning?

Skeptics of high-tech educational tools have some new ammunition: A new study has found that grade-school students who have  home computers perform worse in class than those who do not have computers. The study, conducted by a pair of professors at the University of Munich, tracked the academic progress of 100,000 15-year-old students across the world—and provided evidence, the  researchers say, that home computers are often distractions rather than useful learning tools.