How do you teach kids correct speech?

[MartyBartfast]

Not as in regional pronunciation or variation, but both DSs say eg. “smoove” and “viss” instead of smooth and this. Neither DP nor I do it, nor any friends/relatives. I don’t want to give them a hang up about speech by correcting them every time they say anything, but it’s just wrong and don’t want them to grow up still doing it (they’re 10 and 8 now, which suggests we’ve somehow let it slip through for way too long).

Thanks x

My DS has had to have extensive speech therapy. When it comes to pronounciation the therapist tends to focus on getting them to imitate mouth shape/ movement, tongue position etc to get the sound correct.

Can you get them to regularly read out loud to you. This will help reinforce correct pronunciation