<P> The area in front of this facade features a "hoarding area" where students gather, a street, and a bus stop across the road . The studio's backlot is used for exterior shots of the characters' houses, which is one unit dressed differently for each house, and The Dot Grill . The building for The Dot is the only one on the backlot large enough to allow filming inside; scenes taking places inside the school and house interiors are filmed on one of four sound stages . </P> <P> Studio A contains sets for the school's hallways, washrooms, cafeteria and classrooms . The hallways are stenciled with phrases such as "the perfect human being is all human", which were found at the Etobicoke School for the Arts, one of the many schools that set designers used during their original research . The washroom set is used for the girls' and boys' room; urinals are installed and removed as needed ." It is also used as the studio's cafeteria where the cast and crew eat . </P> <P> In addition to being used as the exterior of the school, Studio C holds sets for the school's entrance foyer, the gymnasium, the media lab and a hallway with lockers . As the franchise progressed and the budget increased, a stairway and balcony was installed in the foyer in an attempt to get characters off the floor and not all appear in the same geometric plane . For the first few seasons of The Next Generation, the gym floor was made of real wooden floorboards; due to warping, it was replaced by concrete painted to look like wood . </P> <P> Studio B contains the sets for the characters' houses . The fourth studio, Studio D, houses all the production offices, dressing rooms, and make - up and hair departments . </P>

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