“…The PEAK content is divided into six main skill domains: foundational learning, perceptual learning, verbal comprehension, verbal reasoning, memory, and mathematical skills (Rowsey et al 2015). Although research has supported the effectiveness of the PEAK (Dixon et al, 2017;Dunkel-Jackson & Dixon, 2018;Dixon, Belisle, Stanley, & Rowsey, 2018), the program's success rests on staff implementation of the protocol. The PEAK curriculum was designed to be user-friendly for parents, teachers, and direct-care staff, in addition to behavior analysts and other trained professionals, however training is required to establish the proper instructional skills to teach each of the skill domains (Hahs & Jarynowski, 2019).…”