This book, The Effectiveness of Error Correction During Oral Interaction, sheds light on two different techniques in solving problems of errors during oral conversation. Mostly, erroneous utterances in using English modals as this part of grammar might be of difficulty for some of the EFL learners and Saudi students in particular. The book presents the results of applying implicit type of corrective feedback in the form of recast and explicit kind of feedback in the form of metalinguistic information, in two different contexts, United Kingdom and Saudi Arabia. The book contributes to the field of education, teachers of English as a second / foreign language, and researchers.