This session is part one of four on the New Science TEKS series for kindergarten through second grade. In Matter and Its Properties, participants will begin the journey to understanding the new science and engineering practices (SEPs) and updates to the K-2 content strands. SEP topics will include science vs. engineering, claim-evidence-reasoning, introduction to recurring themes and concepts, and design problems. Science content topics will include energy, whole from parts, physical properties, and physical change.