This document discusses techniques for error correction in the EFL classroom. It outlines that correction should be done to prevent fossilization of errors, but excessive feedback can hinder learning. There are different types of error correction, including teacher-student, student-student, and self-correction, each with pros and cons. Self-correction in particular trains students to listen to themselves and take responsibility for their learning. The document also provides examples of error codes and games to help facilitate error correction in the classroom.