The school board of each public school and chartered public school shall post in a clearly visible location in a public area of the school that is readily accessible to students a sign that is provided in an electronic or printed form by the division for children, youth, and families, and that contains the telephone number operated by the New Hampshire division for children, youth, and families of the department of health and human services, to receive reports of child abuse or neglect and instructions on how to access the division for children, youth, and families website.