This is a 3-day training for the OpenSciEd 7th grade instructional unit focusing on metabolic reactions titled, “How does stuff inside our bodies make us feel the way we do?” The OpenSciEd project provides curriculum that is free, coherent, rigorous, research-based, and which supports all students in meeting the vision for science literacy described in A Framework for K-12 Science Education and the Next Generation Science Standards (NGSS). This particular session will focus on training participants in implementing high-leverage instructional routines and conducting investigations to teach 7th grade unit which focuses on metabolic reactions by engaging students in a series of labs, by having them create and refine models to explain their understanding of the phenomenon, and finally by having them construct an explanation for why an imaginary teen is having so many health issues. Participants will receive a copy of the unit and supporting instructional materials that accompany the unit (a plethora of slides presentations, handouts, etc.). Lab materials to implement in the classroom will not be provided.