Virtual mobility refers to students and teachers in higher education using another institution outside their own country to study or teach for a limited time, without physically leaving their home. It complements physical mobility in which students travel to study abroad, such as within the Erasmus Programme. The two forms of mobility together constitute academic mobility. Student and teacher mobility are perceived as important quality issues in higher education. The public policy background is to be found, e.g. in the Leuven declaration on Mobility, by 46 European Higher education ministers.