Ключевые слова: advertisement, advertising, background, black, blackboard, business, career, chalk, chalkboard, challenge, classroom, college, communication, concept, continuing, development, education, goal, growth, handwriting, important, information, internet, learn, message, motivation, occupation, online, plan, professional, progress, result, school, seminar, sign, skill, space, strategy, student, success, symbol, talent, teaching, text, time, trainer, training, university, white, word,