The term 'CLASSROOM SOUND' can be broken down into five crossword solutions: PSST (4 letters), GLOBE (5 letters), TEST (4 letters), DESK (4 letters), and ERASER (6 letters). PSST is an interjection used to get someone's attention without drawing attention from others, often heard in a classroom setting. A GLOBE is a three-dimensional model of the Earth or other celestial body, often found in classrooms for educational purposes. A TEST is an assessment used to measure a student's knowledge on a particular subject, also commonly found in classrooms. A DESK is a piece of furniture used for writing and studying, typically found in classrooms. An ERASER is a tool used to remove pencil marks from paper, often used by students in a classroom setting.