The content originally appeared on: CNN New Delhi (CNN)Dharini Mathur's son had just turned 4 when he started pre-school online. More than 600 days later, he still sits behind his computer screen, attempting to learn virtually - while making zero contact with his classmates and teachers. He is one of more than 4 million children in India's capital, Delhi, forced out of the classroom because of the coronavirus pandemic. The ongoing mass closure, according to Mathur, is severely affecting their […]