Childhood apraxia of speech (AOS) is characterized by impaired motor planning/programming and symptoms largely present themselves as reduced intelligibility and disrupted phonological systems (Murray, McCabe, & Ballard, 2014). The CYCLES approach to phonological remediation targets intelligibility deficits and aberrant phonological processes. Therefore, this critically appraised topic investigated the experimental evidence supporting use of the CYCLES approach in treating phonological processes and speech intelligibility in childhood apraxia of speech (AOS). Following database searches and application of inclusion/exclusion criteria, four relevant studies emerged. One well-designed quasi-experimental study was selected as best evidence and reviewed. Using a single-subject multiple baseline design across behaviors, three children between 4:3 and 5:3 with moderate-severe speech sound disorder (SSD) received 2 cycles of therapy (18 hours of cycles intervention over six weeks). Of primary interest was the number of target sounds correctly produced during administration of the generalization probe. Significance was determined by analyzing results from pre and post standardized testing. Social validity was measured using a parent report questionnaire. Results indicated two of the three children displayed statistically significant speech sound improvements following treatment. For all children, improvement or stability of target sounds was noted two months post-treatment. Results showed strong evidence for the unmodified cycles approach in treating children with SSD. Childhood apraxia of speech (AOS) manifests with reduced speech intelligibility (Murray, McCabe, & Ballard, 2014); therefore, using CYCLES to treat intelligibility in this population should yield positive results. Implications for practice, education and future research will be discussed.