The objectives of this study are (1) To determine the implementation process of the Auditory Intellectually Repetition (AIR) type cooperative learning model in the basic subjects of class X communication. (2) To determine the effect of using the Auditory Intellectually Repetition (AIR) cooperative learning model on students' public speaking skills. This research is a quantitative research with the type of research Pre-experiment type Intact Group Comparison.The data collection method uses observation of the learning process and public speaking ability tests. Meanwhile, to test the hypothesis using the Independent t-test with prerequisites before calculating the data, it must be ensured that the data is valid, reliable, homogeneous and normally distributed. Based on the results of the analysis of observational data of the learning process, it can be concluded that the implementation of learning is classified as "Good". Meanwhile, the results of data analysis from the public speaking ability test show that the Auditory Intellectually Repetition (AIR) type cooperative learning model has an effect in improving students' public speaking skills. This is evidenced by the results of the t test, namely the value of Sig. (2-Tailed) post test in the experimental group and the control group with a value of Sig. (2-Tailed) 0.000 < 0.05 then it can be said to be rejected and accepted. Which means that the application of the Auditory Intellectually Repetition (AIR) type cooperative learning model affects the public speaking ability of grade X students of SMK Negeri 12 Surabaya in Basic Communication subjects. Post-test scores  between the control and experimental groups showed a significant difference, namely the  control group of  68.22 and the experimental group of 80.06 which means there was an increase  in public speaking skills in students.

Keywords : Cooperative Learning Model, Auditory Intellectually Repetition, Basic Communication, Public speaking