sentence: A class of children dressed in white gi's are walking, kicking and punching in a classroom while their teacher walks around them. sentence:  The class stops and the instructor talks and walks around them. sentence:  The class then turns around and begins to walk, kick and punch in the direction they just came from. sentence: The class turns around when they get to the end, stops, and the instructor begins talking and demonstrating a kick and a punch to them, moves out of the way and the class resumes. sentence:  When they reach the end they turn around again to walk, kick and punch back in the direction they came from and once again the instructor stops them to talk and demonstrate the moves and once again the class resumes their movements and when hey get to the end of the room they turn around and end their routine with their legs apart and arms in front of them.