This document provides a detailed lesson plan for teaching Grade 1 students about the three phases of matter - solid, liquid, and gas. The lesson plan outlines objectives, materials, procedures, and evaluation. Students will learn to identify, describe, and apply their understanding of the three phases of matter through group activities, discussions, and an assignment pasting pictures into their notebooks. The procedures take students through observing examples, discussing characteristics of each phase, and an activity to demonstrate their understanding of sorting objects by phase of matter.