Ключевые слова: arrangement, background, biology, blackboard, book, bookshelf, chalk, chemistry, class, classroom, colorful, concept, degree, desk, drawing, edition, educate, education, equipment, formulas, green, group, hardcover, knowledge, laboratory, learn, library, literature, microscope, notebook, old, open, page, paper, read, school, science, stack, student, study, studying, table, teacher, textbook, university, vintage, wall, wisdom, wood, wooden,