Ключевые слова: abstract, activity, background, black, blackboard, board, chalk, chalkboard, challenge, class, classroom, college, competition, concept, concepts, cross, crossing, draw, drawing, drawn, education, entertainment, fun, game, games, green, hand, health, idea, leisure, line, play, school, skill, strategy, success, tac, tic, ticktacktoe, tictactoe, toe, trick, victory, white, win, write,