Irvine police say 30-year-old Zachary Reeder, who was arrested last weekend and posted $1 million bail, convinced the boys to send him sexually explicit photographs of themselves.
It's not believed Reeder had any in-person contact with the boys.
Reeder is a history teacher at Servite High School, a Catholic all-boys school.
The Orange County Register ( http://bit.ly/XQMvzS) says Reeder posed as a "young, blonde, white female" on the social networking site to get boys as young as 14 to send photos.
Prosecutors have charged Reeder with 140 felony counts involving child porn.
Information from: The Orange County Register, http://www.ocregister.com