Mixtures and Solutions Teacher Guide Author:Lowery Mixtures and Solutions - Teacher Guide — Grades 5 - 6 — Chemistry is the study of the structure of matter and the changes or transformations that take place in it. Learning about the makeup of substances gives us knowledge about how things go together and how they can be taken apart. Learning about changes in substances is important for several re... more »asons: changes can be controlled to produce new materials; changes can be used to give off energy to run machines. The Mixtures and Solutions Module has four investigations to introduce students to these fundamental ideas in chemistry.« less