There are two parts to the Parent's Right To Know Policy:

Notification of Parents Right to Know Each School Year: School districts must notify parents of children attending Title I schools that they can request information regarding their children's teachers, including, at a minimum, information on (1) completion of state requirements for licensure and certification; (2) emergency or other provisional status; (3) educational background; and (4) whether paraprofessionals are serving the child and, if so, the paraprofessionals' qualifications.

The law states that school districts must "notify the parents of each student" attending a Title I school of the parents' right to request such information. 

Notification to Parents When Students are Taught by a Teacher Who is Not Highly Qualified:
Parents of students in Title I schools must be notified, in a timely manner, if their child has been assigned to, or has been taught for four or more consecutive weeks by, a teacher who is not highly qualified [Section 1111(h)(6)]. Saint Paul Proceedures to meet this requirement. Below are samples of model letters you can use when a teacher is on a varience, waiver, etc.