Institutions are opened for children of parents who cannot take care of children at home (e.g. because they work in essential sectors). There will be a system of shifts for those pupils returning on 18 May and 3 June. Half the pupils of every class will be at school on Monday; Tuesday and Wednesday; the other half on Thursday and Friday. The halves will switch every week so that each pupil attends 5 days of school over a 14-period. Extra-curricular activities such as sport and music are currently suspended.