Students ask Doubtnut (Surge 01 2019) for help on learning to solve over 500,000 math & science problems every day. The majority live in Tier 2 & 3 cities — and in homes that have only recently come online. EdTech companies that want to reach the ‘bharat’ in emerging India need talk in their customer’s language — and to build for the students, who are the CTOs of their families, says Co-Founder Tanushree Nagori .