The document outlines three units that are part of an essential science curriculum. The first unit covers family members and activities at home and school. It lists different relatives and roles at school like teacher and caretaker. The second unit describes parts of the body like the head, arms, and legs. It also lists different feelings. The third unit introduces the five senses of sight, hearing, taste, smell, and touch. It provides examples of using each sense and descriptive words related to each sense.