Hi Melinda
I think that a lot of the problem is due to his voice probably not having finished changing yet and what he hears from you has different harmonic frequencies etc. I'd be surprised, but I would imagine he's still in the middle of the transition, and that those notes are on the higher side of where his voice naturally lies, which adds to the confusion. What pitch does he speak on?
You might just have to wait a little
Peter
Peter B North Tenor, Choral Director, Singing Teacher Ely Cambs. UK
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