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From Algebra to Architecture, with Jim Ellis

In this episode of Data Talks, we sit down with Jim Ellis, math teacher at the American International School of Vienna and author of "Educators as Designers," to explore how his background in architecture reshaped his approach to teaching math. Jim walks us through the parallels between architectural design and effective data-informed instruction, and how that lens has shaped a career built around curiosity and critical thinking.

We dig into the World Insights Challenge, the global math competition Jim co-leads with Kat Petra from the International School of Amsterdam, where students from around the world use real data to explore questions tied to the SDGs, building original visualizations that matter to their own communities.

Jim also opens up about AI's growing role in education: its potential to identify learning needs like dyslexia and dyscalculia far faster than humans can, and the coming shift away from homework toward classrooms as spaces for live, creative learning. He paints a picture of what math class could look like for the next generation, one where students lead their own discovery rather than simply absorb instruction.

We close things out, as always, with Jim's favorite number: 360, and the surprisingly rich history behind it.

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Data Talks is produced by World Data Lab, bringing global data to life through insights, conversations, and stories that matter.

Join Data Talks

Payments Are About People: Innovation from the Digital South

What does a journalist turned payments executive see that others miss? In this episode, Wolfgang Fengler sits down with Estelita Haas, Head of Market Intelligence and Product Marketing at Ebanx, a fast-growing Brazilian fintech unicorn now operating in 25+ countries across Latin America, Africa, and Asia.

Estelita shares how her background reporting from Brazil's overlooked regions shaped her conviction that the most important stories, and the most important markets, are the ones nobody is paying attention to. That same instinct drives Ebanx's focus on the "Digital South": hundreds of millions of mobile-first, young, middle-class consumers who are transacting online for the first time and can't be reached with a card-first checkout.

In this conversation, you'll hear about the innovation happening right now in emerging market payments, from Brazil's Pix reaching 95% adult adoption in under five years, to India's UPI embedding inside Rupay cards, to M-Pesa in Kenya issuing virtual cards for online purchases. Estelita argues that rather than competing, these payment methods are feeding each other and building a larger, more inclusive ecosystem.

Key themes: fintech innovation, emerging markets, financial inclusion, digital payments, the Global South, consumer behaviour, SaaS, gaming, social commerce.

🔗 Learn more at worlddatalab.com
Data Talks is produced by World Data Lab, bringing global data to life through insights, conversations, and stories that matter.

Join Data Talks

Can data predict the next big consumer trend?

In this episode of Data Talks, Wolfgang Fengler speaks with Yarden Horwitz, Co-Founder of Spate, about the science of spotting trends before they go mainstream.

Drawing on her experience at Google and building one of the fastest-growing trend intelligence platforms, Yarden explains how brands can use search, social, and behavioral data to understand what consumers want next. From beauty and wellness trends to generational shifts and artificial intelligence, this conversation explores how data reveals emerging opportunities long before they appear in the headlines.

Yarden shares lessons from building a startup through Y Combinator, discusses why trends like press-on nails and longevity treatments have endured, and explains why the future of AI is not about replacing humans—but helping them tell better stories with data.

A fascinating discussion for anyone interested in consumer behavior, innovation, marketing, and the future of insights.

🔗 Learn more at worlddatalab.com
Data Talks is produced by World Data Lab, bringing global data to life through insights, conversations, and stories that matter.