This case study aimed to develop the pre-verbal communicative behaviors, receptive and expressive language skills of a nine year old autistic boy with limited receptive language skills, no expressive language skills and whose pre-verbal communicative behaviors are not adequate to maintain ongoing communication. To achieve this milieu teaching was used with a variety of techniques applied in a naturalistic environment based on games.In the study, in order to evaluate the child’s pre-verbal communication behaviors, receptive and expressive language skills, check lists were developed, communication samples obtained in a naturalistic environment and interviews were conducted with families. The study went on for two months and acquisitions obtained during this process have been evaluated.

Keywords: Language acquisition, milieu teaching, naturalistic environment, autism