Objective: The aim of this study is to investigate whether the Yalçınkaya method based on auditory processing can be effective in language development education by comparing it with the developmental language module in children with language and speech delay. Developmental language module is an educational service provided to individuals with language and speech difficulties in special education and rehabilitation centers. Material and Methods: The average age of 48 months, 28 children with normal development except for the language section of the Denver II Developmental Screening Test: age, gender, recipient and expressive language age were divided into two groups. Both groups have 4 girls and 10 boys, at the total 14 children. The first group was educated with Yalçınyaka method and the second group educated with developmental language module method at special education centre. Language age and chronological age, language acquisition age, total word counts and the effect of the methods were compared at the end of 4, 8 and 12 months of education by using Preschool Language Scale-4 (PLS4), Turkish expressive and receptive language test (TIFALDI) and Speech Sounds Development Test. Results: The chronological age and language ages of the study and control groups at the 4th, 8th and 12th months were compared with the Friedman Test. At the end of the 12th month, the PLS-4 recipient language age and the chronological age were equal for study group, and the delay in the control group continued. TIFALDI recipient and expression language standard scores were found to be significantly increased in both groups. While there was a difference between the groups in the development of speech sounds in the 4th and 8th months, but there was no significant difference between the groups in the 12th month. In the Mann-Whitney U test, a significant difference was found between the groups in the total word counts they learned in the 8th and 12th months (p<0.01). Conclusion: The Yalçınkaya method was found to be effective in language development education. These findings are consistent with auditory processing and language processing physiology. Because after hearing occurs, auditory (all the sounds in the spoken speech, the sounds that make up the words in the sentences, the order and duration of the hearing, and the words and sounds match), then language processing begins to add meaning. Therefore, the Yalçınkaya method based on auditory processing can be added to the developmental language module training, and it can be used in the language development training of other children (developmental language delay, autistic, hearing aid, cochlear implant, ...).