MCS Happenings Position Open for Fall 2002 Renovation Information Montessori Country School (MCS) is a non-profit, parent owned school, operated in Herndon, Virginia, since 1971. MCS accepts students 2-1/2 through 6 years old. We offer a five day program: 9-12 for preschoolers, 9-2:30 for kindergartners; and a three day program: 12:30-2:30 Tuesday-Thursday . Programs Offered Enriched Montessori ...