The Miami Valley School (MVS) is an independent school for grades Pre-K through 12, located in Dayton, Ohio, founded in 1964. The Miami Valley School is a non-profit organization. Approximately 190 students comprise grades 9 through 12. The early childhood through 5th grade unit is called the Lower School, instead of the more common elementary school. The 6th through 8th-grade academic unit has the traditional Middle School title.