Ключевые слова: analysis, analyze, background, billboard, black, blackboard, board, business, chalk, chalkboard, chart, class, classroom, corporate, data, diagram, drawing, economy, education, figure, finance, graph, grow, growth, illustration, improvement, increase, investment, lecturer, lesson, market, office, presentation, price, profit, report, research, room, school, simple, sketch, statistics, stats, stock, strategy, success, successful, university, up, white,