Hi again @ConcernedMomof1 , I can hear how worried you are about your 17yo - it does sound like his response to praise is a really common one though ... as @Schooner has said.
We have some ideas over here about self-confidence and communication might be helpful! let us know
Does you son do any hobbies out side of school - sports or anything? If he struggles with school, it might be a positive for his self-esteem if he can start building skills elsewhere?
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