Children have inherent curiosities about their world. The CGPS Science program leverages these natural inquiry skills to help students make connections between the classroom and everyday life. In Pre-K, children learn about plants, people, and animals along with seasons and the weather. In Kindergarten, numerous field trips and guest visitors are used to explore how the living things around them work and change. In First Grade, students learn scientific processing skills such as asking questions, making observations, and providing evidence as they study living, nonliving, and once-living things.

Second graders use the water cycle to study matter—what it is, it's different states, and how it’s transformed by nature and humans. They also use the weather to explore the concepts of energy and force. In Third Grade, students embark on a study of ecosystems with a focus on the Hudson River, learning about food chains, living organisms, and how humans can positively and negatively impact an ecosystem. In their final year of Lower School, Fourth graders focus on earth science. By studying land formations, fossil fuels, rocks, and minerals, students hone their abilities to do science through inquiry and participate in a variety of experiments.