Complex sentence: Part of the reason why parents of students who are deaf wanted instructors who were deaf was to allow their children to have a role model, by allowing more instructors who were deaf allowing their children to see a possible future for themselves through their instructors.
Split into simpler sentences: Part of the reason why parents of students who are deaf wanted instructors who were deaf was to allow their children to have a role model. By allowing more instructors who were deaf allowing their children to see a possible future for themselves through their instructors.