Maryvale ES www.montgomeryschoolsmd.org/schools/maryvalees/ 1010 1st Street Rockville, MD 20850 39.102736 -77.103983 Maryvale ES1010 1st StreetRockville,MD 20850 Phone: 240-740-4330 Fax: 301-545-1030 : 240-740-4340 Mrs. Margaret (Susie) S.Prin, Principal Staff Directory