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Al Goldis, Associated Press
Michigan State's Keith Appling, left, and Iowa's Bryce Cartwright vie for the ball during the first half of an NCAA college basketball game Tuesday, Jan. 10, 2012, in East Lansing, Mich.

EAST LANSING, Mich. — Draymond Green had 22 points and nine rebounds to help No. 6 Michigan State beat Iowa 95-61 on Tuesday night for its 15th straight win.

The win gives the Spartans (15-2, 4-0 Big Ten) their longest winning streak since the 1998-99 season, when they won 22 in a row before losing to Duke in the national championship game.

The Hawkeyes (10-8, 2-3) have been routed in two straight games — they also lost to Ohio State — after beating Wisconsin and Minnesota on the road.

Aaron White scored 15 points and Devyn Marble had 12 for Iowa.

Michigan State went on a 16-0 run late in the first half and had a 14-0 spurt midway through the second.

During the second burst, Iowa coach Fran McCaffery was called for a technical for berating an official. McCaffery then directed his anger toward his players, slamming a chair in their timeout huddle and screaming in their faces.