Ключевые слова: apple, black, blackboard, board, caucasian, chalk, chalkboard, class, clean, close, college, concept, dark, draw, drawing, education, grade, graph, graphic, green, hand, handwriting, holding, horizontal, illustration, lesson, line, mature, one, outline, paper, pencil, person, plane, ruler, school, student, style, stylish, teach, teacher, text, university, up, white, work, write, writing, young,