which way is more effective

I would like to know which of two teaching ways/methods/approaches is more effective when learning/practising spoken English by talking/conversing with a native speaker.

1. The start-stop way
The first One way is that (this is an awkward way to express it, but it is not incorrect) during the conversation the teachers stops the student whenever he makes a mistake, no matter that/whether it's a grammar issue one or the student used a wrong word or phrase, or mispronounced a word. The good thing about this way is that the student will get be corrected for every mistake he makes and he will have a deep impression and not therefore unlikely to make the same mistake again. The bad thing about this is that the conversation is not as smooth as it should be, both the student and the teacher might forget what's theirthe original topic is, if too much time is spent on the correction.

2. The ignore the mistakes way
The other/second way is that the teacher lets the conversation go on and ignores all the mistakes the student makes, as long as he knows what the student is trying to express. In this way the student will gain confidence and get used to expressing his ideas in English gradually(?), however at the same time the mistakes he made will be strengthened/confirmed/reinforced; I mean, he will get used to repeating/in the habit of making the mistakes he has made, as well because he is always repeating his mistakes.

Instead of saying 'the first/second way is that the teacher...' you could express it as 'In this approach, the teacher ...'
 
which way do you think is more effective?

I dont stop the flow, until at least a sentence or thought or paragraph is completed (or the words are totally incomprehensible) but write down the issues and problem words as I listen, and then go back over them

Which way is more effective?

I would like to know which way is more effective when learning English by talking with a native speaker.

One way is that during the conversation the teachers stops the student whenever he makes a mistake, no matter if it's a grammar one or the student used a wrong word or phrase. The good thing about this way is that the student will get corrected for every mistake he makes and he will have a deep impression and is not likely to make the same mistake again. The bad thing about this is that the conversation is not as smooth as it should be and both the student and the teacher might forget what their original topic is if too much time is spent on the correction.

The other way is that the teacher lets the conversation go on and ignores the mistakes the student makes, as long as he knows what the student is trying to express. This way the student will gain confidence and gets used to expressing his ideas in English gradually, however at the same time the mistakes he made will be strengthened.  I mean, he will get used to the mistakes he has made as well because he is always repeating his mistakes.

Which way do you think is more effective?

--------

ANSWER

Never do anything to hurt the student's confidence!   If you discourage the student they will stop trying, or at least stop trying as hard.   If you encourage the student they will try extra hard, and the student (or child, or friend) will always try extra hard to live up to your expectations.   Nobody wants to disapoint.