Substitute teacher at Texas high school asked to leave after singing Britney Spears' 'Toxic' to class

A substitute teacher in the US state of Texas has reportedly been let go after performing a karaoke rendition of Britney Spears' hit 'Toxic' to the class. 

A video obtained by local news outlet KXAN, filmed by a stunned student, shows the teacher sitting at his desk surrounded by colourful strobe lights, singing the well-known pop track. 

"With a taste of a poison paradise, I'm addicted to you. Don't you know that you're toxic?" the man can be heard singing in the clip. 

A spokesperson for the Austin Independent School District (AISD) confirmed the teacher had brought in a karaoke machine to Bowie High School and was asked to leave after the first period. 

"I've heard worse Britney Spears covers, but the lights are a bit much," the spokesperson said. 

The substitute teacher was accused of not following the school district's "best practices". 

According to the AISD handbook, substitute teachers are required to "follow the plans exactly as left by the regular teacher" and maintain the typical routine of the class. 

KXAN reports that the unidentified teacher picked up another job at Austin High School after the Britney Spears incident and was once again "relieved of his duty"; but not before performing another song, thought to be a Lady Gaga number. 

The father of the boy who recorded the video was pleased by Bowie High School's swift action in removing the substitute. 

"It was all a bit confusing. We didn't know what this was all about until our son explained what it was," Andre Abelkis told The New York Post

"Yes, we were a little upset that a substitute teacher would not care about teaching the class and just do something for themselves. And, yes, I think the teacher should have been removed from class."