IEP/IFSP development (school-based settings) AAC (Augmentative and Alternative Communication) systems Public elementary schools Private practice clinics Language disorders (receptive and expressive language delays/disorders) Preschool-aged children Autism spectrum disorder (ASD) Individuals who use augmentative and alternative communication (AAC) Medically complex children Developmental disabilities (e.g., Down syndrome, intellectual disabilities) Adolescents Speech sound disorders (articulation, phonology)