Among the illegal and disturbing behavior the 62-year-old Berndt allegedly displayed, he is accused of blindfolding children and spoon-feeding them cookies laced with his semen in what he called "tasting games."
According to CBS Los Angeles, Berndt is also accused of taking photos of students while they were bound and gagged in his classroom. Some photos reportedly show cockroaches being placed on students' faces.
Berndt entered the legal equivalent of guilty pleas to the charges at a hearing Friday. He had previously pleaded not guilty to the charges.
The agreement was reportedly reached in order to protect his alleged victims from testifying. The deal calls for Berndt to be sentenced to 25 years in prison.
He was initially arrested in January 2012. His crimes allegedly occurred between 2005 and 2010.
Parents filed suit against Los Angeles Unified School District for failing to protect their children from Berndt. Settlements have cost the district tens of millions of dollars.