Engage your students in scientific argument with this interactive document. Formatted to use the Claim-Evidence-Reasoning (CER) process to allow students to explain natural phenomena in a way that is aligned with the Next Generation Science Standards (NGSS), this resource focuses on the Normalometer just at the moment that two carts with Normalometers collide.The Normalometer is a compact, easy to use, science apparatus that combines hackable open resources in a unique learning tool that interac