According to a Special Commissioner of Investigation report, English teacher Erin Sayar, 35, had sex with an 11th grader at least eight times last December.
Investigators were tipped off by a girl who had a crush on the alleged victim and read Facebook posts between the two.
Although the student initially denied any romance with Sayar, authorities obtained phone records that showed the couple had exchanged 19 telephone calls and 3,856 text messages in December 2011.
When confronted with the evidence, investigators said the victim admited to having sex with Sayar between 8 and a dozen occassions on the campus of James Madison High School and in her SUV.
Police arrested Sayar on Thursday and charged her on 8 counts, including rape, sexual misconduct and sex abuse.
Sayar is married with a 3-year-old daughter.
The school in Brooklyn is the same one where two females teachers were caught in a naked embrace in a classroom in 2009. They were fired.
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