The complexity approach is a highly researched evidence-based intervention for children with phonological disorders, though not widely used even among seasoned practitioners. Its guiding target selection principle contends that strategically targeting just one or two complex later developing phonemes or clusters will have a broader and more efficient impact on a child’s speech system than by targeting each early developing sound in error one at a time. This presentation will provide an overview and rationale for this approach and explain the principles for target selection. Strategies for choosing appropriate target phonemes and therapy implementation will be discussed.