Anaheim police say 30-year-old Zachary Reeder convinced the boys to send him sexually explicit photographs of themselves.
It's not believed Reeder had any in-person contact with the boys
KCBS-TV says Reeder was arrested on Saturday.
Investigators are trying to determine if Reeder used his job as a history teacher at Servite High School to target victims.
Servite is a Catholic all-boys school.