This resource covers the properties scientists use to describe materials, what really happens when a solid dissolves, and how to separate mixtures by sieving, filtering, evaporating and using a magnet. It then distinguishes reversible changes from irreversible ones, with clear examples of each. It is a ready-to-teach PowerPoint scaffold for an hour-long lesson on properties and changes of materials. Includes two full investigations with fair-test guidance and a closing quiz.