Ключевые слова: blackboard, board, brush, chalk, chalkboard, childhood, class, classroom, clips, closeup, college, compasses, crayons, data, desk, different, dirty, draw, drawing, education, elementary, eraser, globe, green, isolated, learn, lesson, multicolored, notebook, office, open, orange, paints, school, skill, small, space, sticky, supplies, teach, teaching, text, textbook, university, vacations, wall, white, wisdom, write, writing,