gaithersburg-es.mcpsmd.org/ 35 North Summit Avenue Gaithersburg, MD 20877 39.14366037896536 -77.1919816239319 Gaithersburg ES35 North Summit AvenueGaithersburg,MD 20877 Phone: 240-740-4900 Fax: 301-548-7524 Ms. Paula G. Summers, Principal Staff Directory