The Chattanooga Fabrication Institute, a three-day seminar at which educators from across the nation gain hands-on digital fabrication experience, kicked off Monday at the Chattanooga Whiskey Event Hall. During the conference, attendees visit Hamilton County Schools' various Fab Labs to learn how to use emergent technologies, like 3D and laser printing, and bring those lessons and skills back to their classrooms.This year marks the seminar's fourth anniversary and its first sold-out event with 150 attendees from 17 states. -- Chattanooga Times Free Press, Carmen Nesbitt