A lesson from his grandmother gave David Rogier a reason to build MasterClass. Getting famous people to teach was only the beginning of his education.

He built his first traffic empire at 13, took a company public at 25, and now he is betting that the future of marketing is engineering, not copywriting.

Martina Tam is the CEO of Paper, the Montreal-based edtech company that runs one of North America's largest virtual tutoring services for K-12 districts. A Stanford and Wharton alum, she stepped in at the start of 2025 after operator stints at Brightwheel, MasterClass, and Eventbrite, and is now steering Paper's pivot toward its high-impact tutoring program, GROW.