TAMPA — A teacher at Robinson High School was arrested Wednesday after sheriff's deputies said he tried to arrange meeting a 17-year-old girl for intercourse. Timothy Sean Falls Jr., 29, was arrested in Marion County on charges of soliciting sex from a minor and using an electronic device to solicit a minor.The 17-year-old was not identified because of her age. According to the Hillsborough County Sheriff's Office, Falls had several explicit conversations with the girl between June 11 and June 13 on Facebook and via the Kik Messenger application.Falls asked the girl whether she wanted to meet and told her he would be home alone on weekdays from 9 a.m. to 5 p.m. during the summer. Though Falls attempted to meet the girl, the Sheriff's Office said, the two never did meet. No other details about the case were released.Falls lives in Pinellas County. He's listed as a social studies teacher in the faculty directory on the Robinson High School website.His profile on the social networking site LinkedIn states that he started teaching at Robinson High in the 2014-15 school year after earning a master's degree from the University of South Florida.