The Primary Program is comprised of a mixed age classroom with children ranging from two-and-a-half to six years old. This approach provides flexibility in learning pace and allows older children to build self-confidence by sharing what they have learned. The lead teacher in each class is Montessori certified. There is also a teacher's assistant.

Children entering the Montessori Primary Program at age two-and-a-half typically stay in the same classroom with the same teacher for the entire three years. This promotes a familiar environment for the child and a quicker introduction into the classroom work when the child returns to school the next year.

Children work independently or in small groups doing various activities related to the four major areas of Montessori curriculum: practical life skills, sensorial tasks, mathematics, and language. Other areas of education include art, botany, geography, geometry, and music.

The children in the primary program benefit from in-house field trip programs. Past programs have included visits from the Fire Department, Bookmobile, Roper Mountain Science Center, Tuckers Tales Puppet show, Patchwork Playhouse Productions, the Umoja Percussion Ensemble and the Mobile Ark.

At the Montessori School of Greenville we encourage and support parent involvement throughout the child's educational experience. Parents are invited and encouraged to share their cultural heritage, hobbies and vocations with the students where appropriate. In addition to various class and school-wide programs, there are Parent Information Nights and parents and teachers meet twice a year for individual conferences to discuss the development of the child.