Seaman appeared in the Superior Court of Justice in Owen Sound on Monday. The hearing was conducted with a combination of in-person and virtually.
Two other sex-related charges, including one involving a second complainant, were withdrawn.
Seaman is a married father of two children. He lost his job as a teacher as a result of the charges.
He pled guilty to the charge of sexual exploitation.
Seaman will now have several weapons prohibitions and DNA orders. He will also be on the sexual offender registry for 20 years.