SINGAPORE, March 26 -- A former teacher has been jailed for five months in Singapore after sexually exploiting a 15-year-old student during late-night video calls that began as exam consultations.

The 39-year-old man, who cannot be named due to a gag order protecting the victim, pleaded guilty to committing an obscene act with the girl, The Straits Times reported.

The court heard he had taught her biology in 2012 before reconnecting in 2013 via a Facebook group chat titled "Bio consultation" ahead of her O-levels. He later shared his personal number and encouraged students to message him.

Conversations with the victim turned personal. He arranged to meet her at a park near her home on November 14, 2013, a day before her exam.

Deputy P...