Ключевые слова: activity, blackboard, business, cartoon, college, course, design, education, elements, flag, flat, german, germany, graphic, hello, icon, illustration, instructor, isolated, job, knowledge, language, learn, learning, lecture, lesson, occupation, office, over, people, presentation, profession, professional, school, smile, space, study, symbol, teacher, teaching, trainer, training, woman, work, worker,