A school teacher in central Iowa has pled not guilty to federal charges of attempting to entice minors on the Internet. Thirty-two-year-old Steven Williams of Windsor Heights allegedly tried to engage in sexual activities with several teenagers who were actually undercover officers.

The officers, who were posing as 13, 14 or 15-year-old girls online, said Williams sent obscene photos of himself and attempted to solicit sex between July 2010 and this fall. The sixth grade teacher at Summitt Middle School in Johnston was placed on administrative leave following his arrest on November 10th.

Williams’ trial is set for January 3rd.