Heidi Hallstein, 57, of Franklin Township, Ohio entered a written guilty plea for gross sexual imposition and attempted unlawful contact with a minor on Friday

The 57-yer-old high school chemistry teacher, 57, admitted to having sex with the underage student at her house

Portage County Common Pleas Court Judge Laurie Pittman then subsequently convicted Hallstein of both charges

Her plea comes months after her arrest in August when investigators accused her engaging in sexual conduct with a minor student of Hudson High School

Hallstein, who taught chemistry at Hudson High School, reportedly abused the minor student at her home in January, 2017

Hallstein resigned from the school after her arrest in August last year

Portage County Court has not yet scheduled a sentencing date for Hallstein who has been jail on a 10 percent of $30,000 bond since September

A high school chemistry teacher in Ohio has pleaded guilty to having sex trysts in her home with an underage student. 
Appearing before Portage County Common Pleas Court Judge Laurie Pittman, 57-year-old Heidi Hallstein, of Franklin Township, entered a written guilty plea for gross sexual imposition and attempted unlawful contact with a minor on Friday.
She was subsequently convicted of both charges.
Hallstein’s plea comes months after her arrest in August when investigators accused her engaging in sexual conduct with a minor student of Hudson High School, where she taught chemistry, back in January 2017.
The sexual tryst took place at Hallstein’s home where she then lived on West College Avenue and not on school grounds, officials said.

Shortly after her arrest, Hudson City School District Superintendent Phil Herman announced that Hallstein had resigned from her job and said the district would ‘initiate the surrender of Ms. Hallstein’s teaching license with the Ohio Department of Education.’
Hallstein, formerly known as Heidi Gauntner, had been employed by the Hudson City School District since 1995.
‘The charges stem from an alleged sexual encounter that took place off school property, in January 2017, with a former Hudson High School student who was a minor at the time,’ said Herman in his statement.
‘In order to protect the privacy of the student victim and the integrity of the investigation, we cannot share further details at this time.’

The superintendent further stated that the district had been working ‘diligently’ with city police on the case, since they were made aware of the allegations on August 4.
‘The Hudson Police Department investigated these serious allegations, and then properly referred their investigation to the Portage County Sheriff’s Department, where the alleged crime had occurred.’
Herman told district families that the schools should be an environment where young people feel secure.
‘Schools must be a safe and protected place for students, and teachers are held to the highest standards,’ Superintendent Herman said.
‘These allegations are criminal and a violation of the trust that our children, parents, and community place in adults as educators.’

The student is no longer at the school, but had been a student at the time of the abuse. Their age and identity was never shared by police.
The Portage County Court has not yet scheduled a sentencing date for Hallstein who has been jail on a 10 percent of $30,000 bond since September.
According to the website martialpeace.com, Hallstein is a certified martial arts instructor with over 30 years experience who taught karate at a local martial arts studio in Kent, Ohio.