Class size is limited to provide adequate personal instruction in both classroom and lab and allow adequate access to special tools and equipment. Maximum classroom or lab enrollment is 30 students. On occasion, when the maximum is exceeded, Universal Technical Institute will provide an additional instructor to maintain the appropriate student‑to‑instructor ratio. Some manufacturer‑specific courses may have a lower number of maximum students. Note: For Aviation courses the ratio of 25:1 is used to determine when an instructor adds a lab assistant for the class.