This bundle of three lessons is compatible with ALL of the Second Grade Next Generation Science Standards* for Physical Science. The bundle is specially priced at 10% off!!!In these lessons, students will learn about physical science concepts, such as gravity, elasticity, air pressure, forces, energy, engineering, refining, minerals, atoms, molecules, solids, liquids, gases, reversible and irreversible changes in states of matter, and so much more!Here is what’s included in EACH of the THREE le