A teacher who allegedly had sex with four teenagers has been accused of sleeping with two more.

Heather Robertson, 38, a former kindergarten teacher, was originally arrested after she was accused of having sex with four high school students at her home in Lufkin, Texas.

One of the students told police he had been talking and sexting Robertson on Snapchat shortly after spring break.

The teacher then allegedly asked him over to her home for sex.

The student apparently brought a friend along after Roberston agreed and the group had a threesome, according to the warrant.

Another two teenagers also claimed to have had sex with her at her home several times

But she now faces new accusations from two more students.

One of them claimed he had sex with her in her car and apartment and the other said they slept together in her home at Thanksgiving.

Robertson resigned from her teaching position in the Hudson Independent School District on April 20.

The district’s superintendent Mary Ann Whiteker said: ‘We acted immediately and began our investigation.

‘We pursued with the correct protocol we have to follow. I accepted the resignation (Thursday) afternoon, and it has been submitted through the appropriate legal channels.

‘Our investigation has been finalised.’

Robertson has been charged with six counts of aggravated sexual assault of a child and another six counts of inappropriate relationship between a teacher and a student.

The alleged crimes were said to have occurred from October 2016 to March 2017.