As students transition out of the Elementary grades, they have a growing capacity for abstract thinking and analysis. Thus, the Middle School's algebra and geometry curriculum combines more traditional instruction - including text books, lectures, and lab work - with Montessori approaches such as manipulative materials, projects, and seminars. The core curriculum corresponds with the North Carolina Department of Education's Standard Course of Study. Ninth graders complete high school math courses, and receive seven credits which transfer to almost any public or private high school in the United States.
The curriculum also follows an authentic Montessori approach in which math is not taught simply as an isolated discipline, but rather in the context of human history and culture. Classroom learning is integrated with the use of mathematics as part of the occupations, science, and other disciplines. Students use math to help maintain the Land Lab, in the accounting of their produce business, and in multiple other practical situations.