Marin Country Day School | 749 followers on LinkedIn. Our Mission at MCDS is to create an inclusive community of learning that inspires curiosity, empathy and action. | MCDS is an independent K-8 coed day school enrolling 600 students at a 35-acre campus in Corte Madera, 10 miles north of San Francisco. The school's mission is to "create an inclusive community of learning that inspires curiosity, empathy and action." We enroll children from both San Francisco and Marin County.