Most conversations about EdTech evaluation focus on early-stage startups trying to prove their concept works. But what happens when you're no longer a scrappy startup? How do you approach evaluation when you're operating at massive scale, serving millions of learners across different markets and contexts?

Today, I'm speaking with Bozhidar Bashkov from IXL, one of the world's leading EdTech platforms. IXL serves students across multiple subjects and grade levels, which means their approach to evaluation needs to be both rigorous and scalable.

In this conversation, we'll explore how a mature EdTech company thinks about impact measurement, the practical challenges of conducting evaluation when you're already at scale, and how evidence generation evolves as your company grows. We'll also discuss what early-stage founders can learn from IXL's approach, even if they're nowhere near that scale yet.

Whether you're dreaming of reaching millions of learners or just trying to prove impact with your first hundred users, this conversation offers valuable insights into how evaluation practices need to adapt as you grow.