DS is 5 (6 in July) and in Y1. He is very academically able, and really enthusiastic about learning, however we repeatedly get the same comments from teachers (and before that from nursery staff), and I'm keen to help him before there is an academic impact.
Essentially he is introverted and reluctant to participate in teacher-led group discussions, or even answer verbal questions from his teacher. Although, e.g., he is a great reader (and clearly does understand what he is reading) if asked comprehension questions he will usually say "I don't know" (we think to try to avoid being drawn into a discussion, or to avoid being 'wrong'). Ditto with maths - he is really very able here, but reluctant to explain his thoughts and working. Neither his teacher nor us think that his is an issue of ability, as when he is asked to do the same exercises as part of a worksheet / electronically he scores very well - he just doesn't want to talk!
He is fine in the playground - has lots of friends, plays happily with the other children. He is impeccably behaved at school (not always at home!). He just becomes very quiet in the classroom (although interestingly less so in PE and art/music - his music teacher says that he is an enthusiastic participant in music class, in particular). We are told that if the teacher asks a question to the whole class, he will never, ever volunteer the answer, yet if she specifically picks him to answer he usually knows (I have long noticed that at parties he will often be the only children looking the other way and thinking "don't pick me" while all of the others raise their hands if an entertainer asks for an assistant).
He is not especially quiet at home, although he is clearly an introvert, and will happily spend hours reading, writing, drawing etc on his own. He has much more extrovert siblings.
His teacher has suggested that we need to work on him knowing that his opinions are valued, and building his confidence to try sharing his thoughts. I feel like I have failed him a bit here, although I can't quite work out how (I feel as if his whole life I've told him that his work is great, that his pictures are brilliant, that he's such a clever boy... Maybe I've put too much emphasis on this?).
Any suggestions? As he gets older I'm worried that this will start to impact academically, as he won't be assessed as being as able as he is if he can't demonstrate it. Fundamentally I want to support him and let him know that being introverted is fine, but that there's an extent to which he needs to "play the game". I feel as if today's curriculum is far more geared towards extrovert children!