Which duty cannot be performed by a noninstructional teacher's aide?

A noninstructional teacher's aide typically has a role that focuses on supporting the classroom environment in ways that do not directly involve instructional responsibilities. The task of monitoring students during their reading group involves a level of educational instruction and oversight that is generally reserved for qualified educators. This activity includes guiding student engagement, assessing comprehension, and providing tailored academic support, which falls under the instructional domain.

In contrast, organizing classroom materials, assisting with classroom management, and supervising lunch breaks are duties that can be classified as supportive and logistical. These responsibilities do not require specialized teaching skills and can be effectively handled by noninstructional aides. Their role is to facilitate the classroom dynamics and ensure that educators can focus on delivering instruction, while they manage the non-academic tasks. Thus, monitoring students during their reading group is the responsibility that cannot be performed by a noninstructional teacher's aide.