Grade 1 Reader Library

Everything is made of atoms and molecules! Solids, liquids, and gases are all made of atoms, and sound and waves travel right through them.

All living things are made of atoms. Every part of a plant or animal, from roots to wings, is built from tiny atoms working together.

Animals grow, change, and pass traits to their young. Watch how living things change over time and what makes each species unique.

Explore Earth's systems, from the geosphere to the atmosphere, hydrosphere, and beyond. Discover how our planet's spheres interact.