The classroom is the fundamental unit of the school building, serving as the primary environment for direct instruction and student interaction. Typically rectangular or square, it is furnished with individual desks or tables and chairs, arranged in rows, clusters, or a U-shape depending on the teaching style and activity. At the front, a teacher's desk and a prominent writing surface – either a traditional blackboard, a whiteboard, or an interactive display – are central features. Walls are often adorned with educational charts, maps, student work, and subject-specific posters that serve as visual aids and inspiration. Storage units like shelves or cabinets house textbooks, notebooks, and teaching materials. Natural light from windows is supplemented by artificial lighting to ensure visibility. Ventilation is provided through windows or air conditioning systems to maintain air quality and comfort. This space facilitates lectures, group discussions, individual assignments, presentations, and collaborative projects, making it a versatile hub for academic engagement.