(Odin, IL)  —  An ex-teacher has turned herself in to Marion County Police after she was accused of having sex with two 17-year-olds.  Lisa Tate was charged Friday with criminal sexual assault.  Prosecutors say based on the evidence the defendant is charged in only one of the cases.  Tate has stepped down from her teaching job of eleven years with the Odin School District.  She was released from Marion County Jail on Tuesday on a 50-thousand-dollar bond.