Ключевые слова: academic, adult, background, basic, blackboard, board, caucasian, chalk, chalkboard, class, classroom, college, do, education, english, female, foreign, grammar, happy, holding, indoors, information, inscription, instructor, international, knowledge, language, learn, lesson, mature, person, profession, professional, professor, school, small, smiling, space, speak, study, teach, teacher, teaching, text, training, tutor, university, woman,