Elementary Schools 0 Glassmanor Elementary Posted by adminPosted 6 years ago June 5, 2018 Basic Info Glassmanor Elementary is located at 1011 Marcy Avenue, Oxon Hill, MD 20745. The principal is Diane L. Jones. Glassmanor Elementary 0 Inclusiveness 0.0/10 Staffing and resources 0.0/10 Cooperation 0.0/10 Communication 0.0/10 Academic expectations 0.0/10 School Info School Website