Shared patterns exist alongside notable differences such as in teacher beliefs (as charted with the Teaching and Learning International Survey [TALIS]) and in school time use. Since the 2005 study, Teachers Matter, much OECD work has analysed the characteristics of learners and learning, teachers, and how to improve school leadership. Data from the Programme for International Student Assessment (PISA) have permitted specific analyses of aspects of schooling, such as student attitudes towards and knowledge of the environment. Work on the educational role of technology has shown how important is home use for educational outcomes.