In a double-shift system, schools cater for two entirely separate groups of pupils during a school day. The first group of pupils usually attends school from early morning until mid-day, and the second group usually attends from mid-day to late afternoon. Each group uses the same buildings, equipment and other facilities. In some systems the two groups are taught by the same teachers, but in other systems they are taught by different teachers (Bray, 2008: 17).
In the view of many people, these problems outweigh the benefits. Public opinion often opposes introduction of double shifts on the grounds that the system can save money but creates educational and social problems. The extent to which this view is valid may depend on the management of double-shift systems, i.e. it concerns not only the overall concept but also the ways in which the policies are implemented (Bray, 2008: 20).
Bray, Mark. Double-shift schooling: design and operation for cost-effectiveness. Fundamentals of Educational Planning 90. Paris: UNESCO-IIEP, 2008.