My son was so good at reading lips that we'd play a game where we only mouthed words and he'd tell us what we "said". In school we let the teacher know he neede

My son was so good at reading lips that we'd play a game where we only mouthed words and he'd tell us what we "said". In school we let the teacher know he needed to see her say the words on a spelling test. In those younger years that was the only way he could tell the different in some sounds. The big one I remember was "th" and teaching him to look for the tongue on the front teeth. As he is getting older he relies less on seeing lips. I'm hopeful at some point he'll outgrow most issues.