This document outlines problem-based learning (PBL) and project-based learning (PjBL). It describes the key steps of PBL as presenting an ill-structured problem, having students list what they know and need to know, developing a problem statement, listing possible solutions, and presenting findings. An experience with a math PBL around an unfamiliar number system is provided. PjBL is similar but allows more student choice and guidance. Both PBL and PjBL align with constructionist views that learning is best through active "doing."