Sunday might be a day off for most kids, but one classroom in Nguyễn Huệ Secondary School in the central city of Đà Nẵng is full of students on the day of rest every week.

In the class, the teacher showed the children four pictures of faces and asked them who could be a child molester.

The students raised their hands to answer the question.

“Child molesters could be anyone we meet,” the teacher told the students.

That is one of the lessons teacher Phan Thị Thùy Loan, deputy principal of Nguyễn Huệ Secondary School, teaches her students to help them recognise risks of sexual harassment and how to protect themselves.

The free child sexual harassment and school violence class has been opened for almost a year.

Students have flocked to attend the class, especially after reports of school violence and sexual harassment have spread nationwide.