Detectives with the Manatee County Sheriff's Office say despite numerous types of undercover sex sting operations in the past, people continue to try to meet up with young boys and girls online to have sex with them.

This week, they say they caught up with 35 men trying to do just that in Manatee County.

Those arrested include Philip Kornell, a teacher from Chamberlain High School in Tampa and Ricardo Cantu, who works for the U.S. Department of Defense.

"I never expected it. He was a pretty good teacher,” said Kasey Swisher, a student at Chamberlain High School.

School officials say Kornell's only worked as a teacher in Hillsborough County for a year, but students at Chamberlain High say he made a good impression.

"It's horrible. He was a cool teacher. You could talk to him about anything,” said Bryan Bradley.

"It's kinda like one of those things, it's the person you don't expect,” said Nicholas Kay.

Speaking at the Manatee County Sheriff's Office headquarters in Bradenton, Sheriff Brad Steuebe announced the results of their latest undercover sex sting.

"There's some pretty sick people out there,” said Sheriff Brad Steube.

Dubbed as Operation Green Shepherd II, Steube said the weeklong operation resulted in the arrest of 35 men. Undercover detectives met the men online.

"Chat rooms public sites, MySpace, Craigslist, Facebook, the list goes on where predators try to take advantage of children,” said Lt. Todd Shear, with the Manatee County Sheriff’s Office.

Detectives say this week the men came to an undercover residence in Manatee County for what they thought was a sexual encounter with a 14-year-old boy or girl. Instead, they were arrested.

"All of these people, if you think about what they do and positions in the community, it should be shocking to everybody,” said Sheriff Brad Steube.

All the men face a variety of charges including travel to seduce/solicit/entice a child to commit sexual act, use of a computer to seduce/solicit/entice a child to commit a sexual act and attempted lewd and lascivious.

The Department of Homeland Security, FDLE, Bradenton Police and more assisted with this investigation.

Chamberlain High's principal called parents to notify them about the arrest. He stressed no students here were involved.

The district fired Kornell immediately saying he doesn't have tenure so no disciplinary hearings have to take place.

School officials say Kornell did have a clean work history. There were no complaints filed against him in the year that he worked for the district.