Nine regions. Fifty-one lessons. Every specimen dissected, every formula earned, every diagram drawn with your own hand on the page.
Click a region to enter. Each lesson is a playable model, not a lecture — you'll earn the mathematics the same way you earn the badge.
This journal is organised as a slow path, not a dense reference. There is a canonical order through the regions, but you are free to wander. Nothing is locked; progress rings appear only to help you find your way back.