Indian grocery store-owner Rajesh Kumar Sharma has an unusual but inspiring side gig—providing free lessons for hundreds of New Delhi’s poorest children in an open-air school beneath a Metro bridge. Sharma, whose philanthropic story went viral on the Internet in 2012, founded the “Free School: Under the Bridge” where he teaches basic Hindi and English. Volunteer teachers Laxmi Chandra and Shyam Mehto who teach mathematics assist him. As many as 200 students attend the free school on a regular basis.