Even assuming that the student has mastered the ability to "take off elastic-waist pants" (ADT 41), the additional task of using a zipper can create frustration due to the fine-motor skills required. In this sample lesson, the primary focus is dealing with a zipper, which is assumed to be the non separable type, where the end does not come apart but is already connected at the bottom. Caution is encouraged when training in zipper use due to the potential for injuries.