Ключевые слова: background, blackboard, blank, board, border, business, chalkboard, class, classroom, clean, clear, copy, copyspace, corner, draw, drawing, dry, educate, education, empty, erasable, felt tip, frame, framework, illustration, isolate, isolated, learn, magnetic, marker, marketing, network, new, note, notice, noticeboard, object, office, pen, post, presentation, red, reminder, school, space, university, white, whiteboard, work, write,