DS is in Year 6, he is bright, good-natured but he has this absolute inability to filter his 'smart' quips and reactions and it's getting him in trouble at school.
There are times - not every time - where anything he sees as even mild criticism/correction of him doing something wrong (eg not filling in his book correctly, or at home, putting the wrong uniform on etc) he gets very defensive and rolls his eyes, and talks back to give some sort of made-up defence. We've gone over with him at home but he can't keep these thoughts to himself (even can't help commenting when we're talking to siblings, etc) - it's like nothing can override his need to have his say or the last word.
It's getting noticed at school with him being sarcastic and backchatting when he can't seem to comprehend it's totally inappropriate. He's been sent to the office a few times, we've had a chat to his teacher, we all acknowledge that he's not super skilled at reading social situations so probably just defaults to 'quips'.
Longer term yes - he needs to accept where he's done something wrong and correction/criticism isn't going to kill him - but in the short term how do we get him to keep his thoughts/reactions to himself and stop blurting out flippant remarks? (Or muttering them to his friend!) Even if he is being told off for a "genuinely" (or perceived) unfair reason he needs to pick his time and method of challenging this rather than just being facetious.
I would say there's very rarely any real malice to it, just I can completely see how it would become infuriating and distracting at school. He's going to secondary school in September and clearly the teachers will have far less tolerance for this and he could get a name as a trouble-maker. My worry is he sees being told off for this as an overreaction to 'one word' or to 'moving my eyeballs' and resentment will build - because he doesn't grasp that it's disruptive and rude.