Successful education systems are able to guarantee that all students succeed at high levels. Across OECD countries …, around 60% of the overall, country-level variation in student performance can be traced to differences in how well students …

In 2012, 15-year-old students spent over two hours on line each day, on average across OECD countries. The most common …% of students doing one of these every day or almost every day. Students who spent more than six hours per day on line … average across OECD countries, 7% of students spend this much time on line during a typical weekday. …