Schools, colleges and universities have a big demand for invigilators at certain times of the year. It would be uneconomic for them to use permanent full- or even part-time employees for this job. In...

Schools, colleges and universities have a big demand for invigilators at certain times of the year. It would be uneconomic for them to use permanent full- or even part-time employees for this job. In this case ZHCs benefit the employees as well, many invigilators being retired teachers who are happy with this working arrangement.