【明報專訊】NOW three in four children live in countries where all classrooms are closed. While some students are only too glad to binge-watch Netflix or play Minecraft, others are deeply worried about what this lost period of face-to-face learning will mean for their education. As I mentioned last month, A-level exams have been fully cancelled unlike the DSE. Now exam boards are relying upon schools and teachers to produce a centre assessment grade (CAG) for each pupil and put them in rank order for each subject confidentially, based on existing scores and data, which will then be moderated by exam boards and published in August. Students who are dissatisfied with this grade will be able to sit an exam as soon as possible or next summer.