Comparison on the Effectiveness of Different Types of Teacher Feedback on Correcting Oral Production in English Classroom of Postgraduate Education

This paper is mainly about the comparison on effectiveness of three types of corrective feedback: explicit Correction, recasts and elicitation. Through studying on students' oral production, corrected percentage of each feedback type can be calculated. Also by asking students to fill out questionnaires, their preference on different feedback can be concluded. The final research result will be obtained on the basis of these two parts, which brings valuable teaching implications and promotes education.