Ключевые слова: african, africanamerican, background, biology, black, blackboard, cartoon, chalkboard, character, chemical, chemistry, class, classroom, college, confused, design, despair, education, equipment, ethnicity, exhaustion, experiment, failure, flask, flat, glass, glassware, horizontal, human, illustration, instrument, lab, laboratory, layout, male, man, people, person, professor, school, scientist, stress, student, study, table, teacher, test, tool, university,