NGSS 5th Grade Matter & Its Interactions Complete Unit designed so teachers can teach particles, properties of matter, chemical reactions, and conservation of matter directly from interactive slides while students follow along in a chronological Work Bundle. This NGSS-aligned Matter and Its Interactions unit is a complete, low-prep instructional package designed to make teaching matter clear, manageable, and engaging for 5th grade science classrooms. With 26 structured lessons (approximately 50