This activity builds students understanding of the Law of Conservation of Matter through inquiry stations. Students use tools and hands on materials to see the law at work. This is a great example to build background knowledge for struggling students including ESOL students. It is great for cooperative learning and movement in the classroom. This activity builds the foundation for conservation of matter that will later come up in photosynthesis, respiration and balancing chemical equations. This product includes a lesson plan, NGSS standards, station directions, and a student capture sheet.