Mathe ohne Zahlen: Was Lehrer für sich behalten – so erklärt, dass es jeder versteht

The concept is so intriguing—how did the author decide to approach mathematics from this conceptual angle, and what was the initial spark?

The book dives into the nature of mathematical understanding—did it shift how others think about the subject or just deepen the curiosity?

Given the vastness of math, I wonder what guided the choices in framing these ideas in a way that's accessible but still profound.