All parents of Marshall Academy students automatically receive membership in the Parents Alliance, which exists to promote friendly relationships among parents, to acquaint them with the spirit of Marshall Academy, to obtain their cooperation with its objectives for the development of their children, and to initiate the parents' involvement in, and support for, projects and functions.

The Parents Alliance conducts its work under the direction and supervision of the Academy headmaster, who is responsible for approving in advance all publications and events sponsored by the group.