Ключевые слова: abstract, advertisement, advertising, back, background, blackboard, blank, board, canvas, chalk, class, classroom, closeup, concept, creativity, design, drawing, education, empty, exam, exercise, female, hand, handwriting, holding, hole, idea, instructing, learn, learning, lecturer, lesson, marketing, menu, piece, presentation, school, space, study, task, teacher, template, torn, university, used, wall, work, write, writing, yellow,