A nurse's frank approach to teaching her 11-year-old son about sex has led to her being invited to his school to teach sex education, a move which has won acclaim across the country.

Zhou Li, a nurse at Wuhan Third Hospital in Wuhan, Hubei province, conducted the classes earlier this week after her son, Niu Niu, boasted to classmates about the knowledge his mother had imparted at home through PowerPoint presentations.

Now she has given the talk to more than 300 fifth-and sixth-graders at the school in Wuchang district.