When giving feedback to the students, we should always be very careful. As we discussed in the lesson, we cannot correct every single mistake or error, but only those that are relevant to the topic discusses. 

I think that the best way how to correct them is by writing the mistakes down and then showing them to the students and discussing them if needed. Also, I think that if criticizing must be done, it is better to do it in private, not in front of the whole class. 

I found a great poster that gives tips on feedbacks and summarizes the main points: