Ключевые слова: 20s, anger, angry, annoyed, apologizing, apple, arms crossed, art, blackboard, book, boy, caucasian, chalkboard, chemistry, child, childhood, class, classroom, computer graphic, development, digital, digitally generated, doodle, education, elementary, elementary school, equation, female, hand drawn, hands folded, icon, joined hands, learn, learning, lecturer, light bulb, literacy, male, math, mixedrace, offended, requesting, school, schoolboy, science, sorry, standing, stationery, student, study, studying, teacher, tutor, upset, woman, young adult,