Ключевые слова: adult, back, blackboard, boys, caucasian, child, children, classroom, concept, copy, educate, education, educator, explain, explaining, female, gesture, girl, hand, kids, knowledge, learn, learning, lesson, new, notebook, people, positive, primary, profession, pupils, school, secondary, showing, space, standing, student, study, studying, subject, task, teach, teacher, teaching, text, to, topic, tutor, woman, work,