This week, I had the privilege of attending the 4th Annual Summer Sandbox, a 2.5 day conference focused on project-based learning (PBL) and education in the 21st century hosted at Yeshivat Noam in Paramus, NJ. As an educator well aware of the use, jargon, and general interest in PBL within the progressive educational community but without much insight into its underlying principles and methods, I've been meaning to attend this conference for a few years now.