A former suburban Kansas City high school teacher has been put on probation after pleading guilty to having sex with three male students.

The Kansas City Star reports that a Johnson County judge also said Friday that 28-year-old Michelle Preston, of Lenexa, will have to serve 32 months in prison if she violates her 3-year probation term. She also has to register as a sex offender for 25 years.

Preston taught psychology and world geography and coached cheerleading at Shawnee Mission West High School in Overland Park before she was suspended after the allegations surfaced in 2011.

She pleaded guilty in April to three felony counts of having unlawful sexual relations with a student. The students were 17 or 18 when the sexual encounters took place at Preston’s home.