Carlthorp school is an independent, nonprofit day school for children in grades k-6. Carlthorp school provides a strong academic foundation in a diverse and nurturing school community that emphasizes traditional values, disciplined work habits, and excellence in order to prepare our students to achieve their highest potential in education and life.carlthorp school, established in 1939, is the oldest independent school in santa monica. Though the breadth of our curriculum has radically expanded in the LAST 86 years, our basic philosophy remains the same. We focus on the child as a whole, helping the child to grow academically, socially, and ethically - ALL within the framework of a traditionally academic school. The school's traditional approach to education, coupled with positive reinforcement in a caring wholesome environment prepares children to excel in today's competitive society.