Classroom
A classroom was a room in a building, usually a school, where classes were held.

Prior to her assignment aboard  in 2151, Hoshi Sato worked as a linguistic teacher in Brazil on Earth. She taught her class in an exterior classroom. ()

By 2266, some of the Onlies on  hung out in an abandoned classroom which among other things featured a blackboard. ()

Aboard the  starship, there were several small schools of varying sizes located throughout the ship, ranging from actual classrooms () to specialized s. () The  had at least 8 schoolrooms. ()

Simon Tarses declined to become a Starfleet officer because he had no desire to spend four years in classrooms when he could be traveling in space instead. ()

Keiko O'Brien opened a school on Deep Space 9 in 2369. To aid her in this purpose, her husband converted a room on the Promenade into a classroom. ()

DS9's classroom was damaged by a bomb later that year, after Vedek Winn Adami started protesting against the secular subjects taught by Keiko. ()

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Education
Building interiors