Ключевые слова: academic, adult, advice, aspirations, blackboard, business, classroom, color image, communication, concentration, confidence, cooperation, demonstration, desk, discussion, education, expertise, gesturing, guidance, horizontal, idea, indoors, information, instruction, leadership, learning, lecture, lesson, lifestyles, males, mature adult, meeting, meeting room, office, people, planning, presentation, presentation speech, professional, school, school children, standing, student, studying, talking, teacher, teaching, white people, young adult,