Students should be given some time after the recording to check their answers for spelling and grammar. Allow generous time for this stage and walk around the classroom, calling out question numbers where you can see that students have made mistakes. Give them the satisfaction of correcting their own mistakes before you do it for them.
Don’t just tell your students the correct answers. Walk them through the recording one more time, pausing at the critical moments to explain how each answer is given. The difference between a mediocre IELTS teacher and an outstanding one is that the best teachers are active and alert during listening passages for signs that reveal where their students are struggling.