Through investigating solids, liquids, and gases and the phenomena of dissolving, evaporation, and condensation, students develop models to investigate matter at the particle level.

View the video below to see what you and your students will do in this lesson. Because substances are made up of different atoms and molecules, they react in characteristic ways. Production of a gas, ...

Texas gave final approval Friday to optional biblical lesson plans for kindergarten through 5th grade classes in state public schools.