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Teacher Calvin Errol Alcantara is seen in front of his laptop as he talks to his students at home during the first day of classes in Manila, the Philippines, Sept. 13, 2021. The Philippine Department of Education formally opened the school year 2021-2022 on Monday through the online learning, television and radio-based instruction or the "blended learning" modality, as millions of students stay in their homes in observance of the COVID-19 pandemic health protocols being implemented in the country. (Xinhua/Rouelle Umali)