River Valley Charter School a public Montessori school in Massachusetts serving children in grades K-8. Visit www.rivervalleycharter.org The mission of the River Valley Charter School is to provide a rigorous academic program based on the Montessori philosophy and rooted in the history, culture, and ecology of the Merrimack River Valley. Students will reach their full potential as scholars and become self-reliant, productive members of society. They will be adept at critical thinking and creative problem solving and will be fully prepared to succeed in future schools, careers, and civic life.