Ключевые слова: academic, back, blackboard, board, book, books, boy, chalkboard, chemical, chemist, chemistry, child, class, classroom, demotivated, desk, disappointed, education, exam, finger, frustrated, green, homework, kid, learn, learning, lesson, middle, preparation, preparing, pupil, reading, rear, sad, school, schoolboy, science, secondary, showing, stressed, student, study, studying, teenager, textbook, tired, training, unhappy, upset, view,