MONUMENT VALLEY — It’s a bright and blustery day at Monument Valley High School, and the graduation decorations in the courtyard keep blowing away. Principal Spencer Singer stands outside in front of the school, which is located in the heart of Monument …MONUMENT VALLEY — It’s a bright and blustery day at Monument Valley High School, and the graduation decorations in the courtyard keep blowing away. Principal Spencer Singer stands outside in front of the school, which is located in the heart of Monument …