Harbor Day School provides a thorough grounding in the traditional disciplines in an atmosphere that encourages creativity and fosters individual growth.
Harbor Day School's program of studies follows the general curriculum recommendations of the California Association of Independent Schools and the National Association of Independent Schools.
Harbor Day School is organized into a lower and an middle school. The lower school consists of two classes at each grade level from kindergarten through grade four and operates under the leadership of the Lower School Director. Students meet in sections of 22 students per class for all academic subjects. The weekly academic schedule in the lower school typically includes five periods of reading, five periods of writing and grammar, five periods of mathematics, two to three periods of social studies, and two to three periods of science. In addition to this academic core, students meet with specialist teachers for enrichment subjects, such as art, music, technology, physical education, library, engineering/woodshop, and Spanish.
The middle school is composed of grades five through eight and operates under the leadership of the Middle School Director. Fifth grade is the final year of self-contained classroom instruction. Beginning in the sixth grade, the middle school program is fully departmentalized with class sections ranging in size from eight to 16 students.