Rowdy class? Take a few minutes to tire them out with a game of Builders vs Bulldozers. Split half the class into "Builders." Their job is to pick up cones. Half of the class are "Bulldozers." Their job is to knock down the cones. Adjust the teams accordingly if one team is knocking down/putting up cones faster than the other. Basically, the kids expend all their extra energy because the cones are never all knocked over or all placed upright. Works every time!