1. Work on Auditory Discrimination with minimal pairs

2. Play recordings of himself and help him hear that he is saying it incorrectly

3. Try some elicitation techniques:  https://www.youtube.com/watch?v=megGv7jH0a0

• Very Wide Mouth
• Prompt by placing hand near the throat and talk about putting the tongue way back in the mouth
• Push down the front of the tongue with a tongue depressor, lollipop, or finger
• Growl in the back of the mouth then shorten it up
• Lie on the back
• Push up and back under the tongue
• Dinosaur Stomping
• Start with a cough
• Start with /t/ and slide tongue back to /k/
• Hold cheerio down with the tip of the tongue

4. If all else fails, give it a rest and come back to it.  They may just not be ready yet.