A parent-child password has been suggested as a techniques to combat strange approaches after two incidents at Napier primary schools.
Police have also increased their presence around Taradale Intermediate School and Marewa's St Patrick's School after a number of students were approached by strangers in recent days.
On Monday, police were called to Taradale Intermediate on Murphy Rd after a student was approached by a woman in a silver station wagon.
In a statement released by the school, the student said the woman told her "your mum has rung me to come and pick you up", before declining and returning quickly to her friends.