In January of 2011, Cornerstone Montessori Elementary School was recognized as a Minnesota Charter School authorized by Volunteers of America. Cornerstone opened in the fall of 2011 serving children in grades K-2 and will add a grade each successive year until serving children in grades K-6. Cornerstone Montessori Elementary School was founded due to a recognized need for an authentic, AMI Montessori elementary program on St. Paul’s East Side.