A FORMER Ballarat teacher has admitted having sexual liaisons with two students.Michelle Lynn Dennis, 33, yesterday pleaded guilty in the County Court at Ballarat to two counts of sexual penetration of a child under supervision and one count of sexual penetration of a child under 16.Dennis was teaching at Ballarat High School when she committed the offences against two students in 2007.The former music teacher engaged in the sexual acts outside of the school's grounds.Dennis was arrested and charged in October last year and stood down from Ballarat High School.She was suspended from teaching by the Victorian Department of Education and Early Childhood Development.In August, Dennis was committed to stand trial on 26 sexual assault charges after a one-day committal hearing at Ballarat Magistrates Court.She had pleaded not guilty to all of the charges.The court had heard Dennis had sex with one of the boys twice and performed oral sex on the other.She appeared in court yesterday with a male supporter.Dennis' plea hearing is scheduled to be held on November 17 before Judge Susan Cohen in the County Court at Ballarat.