Seven Big Ten teams are receiving votes in the latest Associated Press (AP), USA Today coaches and Harris Interactive polls, including four schools among the top 25. Ohio State extended its winning streak to 20 straight games and improved to 8-0 this season to maintain its position at No. 4 in each ranking. Michigan State improved to 7-1 to return to the top 25 for the first time since Sept. 15, appearing at No. 24 in the media and coaches poll and No. 23 in the Harris standings. Michigan and Wisconsin both had byes on Saturday, with the Badgers rated No. 22 by the media, No. 23 by the coaches and No. 24 by the Harris voters. The Wolverines were ranked No. 23 by the AP and No. 21 by USA Today and Harris. Minnesota moved to 6-2 on Saturday and is now receiving votes for the first time since Sept. 22. Iowa and Nebraska also received votes in at least one poll.