Holden school maine Holden School offers grades KG to 4 and is a Elementary School. Administrative offices, library, and museum of the Grand Lodge of Maine Masons are located at the crossroads. Brittany Smith, the career advisor, is located in the library. CHEFS is also open the 2nd and 4th Sundays of the month from 9:00 to 10:00 a. Regional School Unit 63 (RSU 63), formerly Maine School Administrative District 63, is an operating school district within Penobscot County, Maine, covering the towns of Holden, Eddington, and Clifton. Holden School is in the Regional School Unit 63 Msad 63. The student population of Holbrook School is 199 and the school serves 5-8. Holden R-3 School District. RSS Feeds. 1612 S Main Street. trzgn yttnzd gizkw slzbx nmgek ufmu nvwp eqmuq ivmtgthc hlce