One Schoolhouse is excited to welcome Notre Dame de Sion in Kansas City, Missouri to the One Schoolhouse consortium Notre Dame de Sion is an independent Roman Catholic school providing the highest quality college preparatory education from preschool through grade 12. The school partners with families and the community to prepare students for socially responsible, values based leadership in a culturally and religiously diverse world.. Learn more at www.ndsion.edu. “We are thrilled to have Notre Dame de Sion join our consortium. It is a school committees to academic excellence as well as providing a nurturing and caring sanctuary for all of its students. We welcome them as partners in innovation,” said Executive Director Brad Rathgeber.