If you’re scrolling through Instagram and suddenly find yourself learning accounts or economics while laughing at a meme — chances are, you’ve just entered Sanjay Appan’s classroom. He’s not a Bollywood celebrity, not a tech CEO, not even a marketing guru — yet his voice echoes across every GenZ student group in India. They call him “Appan Sir,”  but for millions online, he’s “The Voice of GenZ 2025”  — a creator who turned teaching into content, and content into a movement.