Ключевые слова: 3d, 3d illustration, background, blackboard, board, book, chair, chalk, chalkboard, class, classroom, clock, college, concept, conference, desk, educate, education, elementary, empty, exam, furnishings, furniture, green, indoor, inside, interior, knowledge, learn, lecture, lesson, light, meeting, nobody, room, school, schoolroom, seat, seminar, student, study, table, teach, training, university, wall, white, window, wood, wooden,