The book investigate native and non-native English language teachers’ treatment of students’ oral errors at Al-Imam University. This book also reveals students’ perceptions of their teachers' corrective treatments. Classroom observation and a questionnaire were used to collect the data. The findings indicated that the teachers varied on how they treated students’ oral errors. Teachers corrected phonological errors the most consistently. Non-native teachers were more tolerant with phonological and content errors than native teachers.