Ключевые слова: advice, advise, ballpen, ballpoint pen, blue, business, businessman, classroom, coach, computer, concept, conceptual, development, educate, education, elearning, electronic, experience, guide, idea, improve, improvement, instruct, instruction, instructor, internet, knowledge, learn, learning, lesson, management, mentor, online, people, person, practice, program, scholar, scholarship, school, student, study, supervise, system, teach, teacher, technology, trainer, training, tutor, web,