LAFAYETTE, Ind. - A fourth-grade Indiana elementary school teacher is facing 13 charges of sexual misbehavior with children after he was allegedly teaching kids how to masturbate when he claimed he was coaching them on how to pitch a baseball.

Joe Kimerer, 46, was booked into jail Friday morning, March 9, at his home without incident. Kimerer's bail has been set at $500,000 surety bond and $50,000 cash.

The Lafayette Police Department began an investigation of Kimerer on Feb. 27, the same day he was also assigned by the school district to home duties, according to a report in The Lafayette Journal & Courier.

The Lafayette School District began procedures Friday, March 9 to terminate Kimerer's employment, according to Les Huddle, school superintendent. That action has not yet been set for a board vote.

According to the probable cause affidavit against Kimerer:

Kimerer was supposed to be teaching children how to pitch a baseball during private lessons at Earhart Elementary School. Instead, Kimerer was coaching them how to masturbate and take photos and videos of the act and of their penises.

At various times, Kimerer asked the boys during practice to go to the bathroom and masturbate, then he asked them to tell him about the ejaculation.

Kimerer also asked the boys about their pubescent development and asked about their penis sizes.

Kimerer also contacted the boys at home to ask them if they had masturbated by using code phrases such as asking if the boys had "done their homework."

Kiemerer has been charged with four counts of vicarious sexual gratification with a child under 14 years old, two counts of child exploitation, two counts of attempted child exploitation, four counts of child solicitation and one count of inappropriate communication with a child.

The earliest allegations against Kimerer date back to the summer of 2014, with the most recent incident occuring Feb. 26, according to charges.

Lafayette police said that many of the incidents happened inside the school during school hours.

In an online bio published on the school's website, Kimerer says he's been a teacher for 18 years, which has since been confirmed by Huddle. Kimerer also passed a routine background check before being hired by the school district.

Kimerer formerly served as an assistant baseball coach for a nearby Indiana high school, but resigned late last year before any allegations against him surfaced.