Ключевые слова: abstract, answer, assignment, background, background material, blank, bright, business, calculation, children, collaboration, concept, connection, copy space, correct answer, design, element, fun, game, graphic, idea, illustration, image, incorrect, jigsaw, jigsaw puzzle, join, joy, knowledge, learning, margin, match, material, multiple, one side, paper, pattern, picture, piece, pieces, plain, play, problem, problem solving, puzzle, puzzle piece, quiz, shape, simple, society, solution, student, symbol, teamwork, template, test, texture, thinking, toy, trouble, unity, white, wisdom, work,