auditorium children classroom forest forest classroom kids learn nature reserve outdoor outdoor school school state park study table tree trunk wood wooden woodland appearance background chairs classroom-furniture desk desks display displayed education educational furniture historic history image old past polished seats child color coloured design graphic home house pencil play primary chair class educations empty spring break 3D abstract Rendered student teacher backboard board greenboard wall write blackboard lesson pupils students teach angles furnishings high-school learning room secondary-school surface surfaces lesson one