The objectives of this research are (1) to investigate the process of classroom interaction in teaching and learning process, (2) to find out the pattern of classroom interaction suggested by Sinclair and Coulthard Initiation-Response-Feedback (IRF) model in English speaking class at SMP 17 GedongTataan. The result reveals that classroom interaction process in English speaking class reflected the pattern proposed by Initiation-Response-Feedback (IRF) Model. There are six exchanges there are which occurred in Sinclair and Coulthard model including Teacher Inform, Teacher Direct, Teacher Elicit, Student Elicit, Student Inform, and Check. The percentage of Student Inform (Initiation-Feedback/IF) was 33.97%, Teacher Elicit (Initiation-Response-Feedback/IRF) was 16.89%, Student Elicit (Initiation-Response/IR) was 14.95%, Teacher Inform (Initiation/I) was 14.12%, Check (Initiation-Response-Feedback/IRF) was 13.01%, and Teacher Direct (Initiation-respond-feedback/IRF) was 7.20%.  Key words: student elicit, student inform, teacher direct, teacher elicit, teacher inform.
                        
                        
                        
                        
                            
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