Ключевые слова: alert, authority, awareness, backdrop, background, behavior, black, blackboard, board, bullying, business, caution, chalk, chalkboard, classroom, color, concept, conflict, copy, crime, criminal, design, desk, dilemma, dirty, draw, dust, education, empty, green, grunge, guilt, handwriting, infraction, judgement, law, learn, legal, lesson, message, messy, mischief, mockup, object, pattern, penalise, penalty, policy, precaution, prevent, problems, punishment, rubbed, rule, safe, school, scratch, sign, small, space, strokes, study, surface, teach, template, text, texture, tolerance, top, unacceptable, used, view, violence, wallpaper, warning, white, wiped, wooden, words, workplace, wrong, zero,