Charles Barnum Elementary is in the Groton Public School District. It serves about 425 students in grades pre-kindergarten through 5, many of whom have parents in the military.
The school has a technology club for students in grades 3 through 5, to help students learn the basics of programs such as Excel, Word, PowerPoint and GarageBand. The school also offers programs in music, art and physical education. Parents and Navy personnel donate hundreds of hours of volunteer time in the school each year. Valerie Nelson is principal.