Ключевые слова: back, background, black, blackboard, board, book, budget, chalk, chalkboard, children, class, classroom, college, community, concept, desk, drawing, educate, elementary, ethnic, financing, graduation, handwriting, high, illustration, learn, lesson, payment, pen, pencil, private, profit, pupil, salary, saving, school, student, studying, support, system, table, teacher, teaching, technology, text, tutor, university, wealthy, white,