Can schools release school pictures, ordering forms, and school records to people?

My child just started school in Arkansas. Some of my ex-inlaws work for the school district. At the beginning we specifically requested to the teacher and principle not to release any information or allow contact with my child while at school. The school agreed and had no problems. School pictures came along and the in laws requested from the principle pictures and order forms. The principle gave a school photo and an order form. Can they do this? Of course that's not all, they also release report cards and other records to the step-parent while the parent was out of state. The step-parent has a power of attorney and claims that gives them all legal rights of the parent including unlimited access to school records. We're checking on the legality of this. If you know the answer to this please feel free to let us know.