This website was a collaborative effort of Dr. Pat Preedy (UK), Dr. John Mascazine (USA), and Dr. David Hay (Australia). Although Dr. Hay has retired, we continue his work in helping parents, teachers, and schools address the needs of families with same – age siblings.
This site is intended to be a resource for Parents, Teachers, and Administrators. We also welcome Twin Support Organizations to use and refer others to these resources.