Ключевые слова: adult, attention, boy, chemistry, child, class, classroom, clever, compound, contemporary, desk, diligent, discussing, education, equipment, experiment, flask, girl, group, job, knowledge, lab, learner, lesson, occupation, person, profession, protective, pupil, school, schoolboy, schoolchild, schoolgirl, schoolwork, secondary, showing, student, study, subject, substance, supplies, teacher, teaching, teamwork, tweezers, whitecoat, woman, working, workplace,