A synthetic procedure is outlined where upper-level undergraduate organic chemistry students perform a two-week, semimicroscale "aza"-Baylis-Hillman reaction to generate an allylic sulfonamide product. Students evaluate several green chemistry reaction metrics of industrial importance (process mass intensity (PMI), E factor, and reaction mass efficiency) and specifically learn the pivotal role that PMI plays in improving operational sustainability. Advantages and disadvantages of the various metrics are highlighted within the context of a multicomponent transformation eliciting current research activity.