Ключевые слова: adhesive note, arrangement, arts abstract, arts and entertainment, arts backgrounds, background, backgrounds, black, blackboard, blank, board, chalk, chalkboard, circled, class, classroom, concept, concepts and ideas, copy space, education, empty, heart, idea, important, learning, letter, list, memo, multible objects, nobody, note, notice board, orange, paint, post it, reminder, representation, school, schooling, shape, signs, symbols, texture, textured effect, to do, visual, wood, writing, yellow,