Sorry, this will probably be a bit long-winded but I don't know how to describe it in a couple of words!!
It makes such a difference in Reception to a shy, quiet child's confidence if their teacher is able to "notice" them in amongst a group of more vociferous children.
My DS1 is very quiet and does not like to push himself forward when an adult is looking for volunteers for something, even though he'd DESPERATELY love to try it. He just hovers at the back putting his hand half up nervously in the air whilst the rest of the class surge forward to the front shouting "Me! Me!", immediately getting themselves noticed.
When he was in Reception last year, I mentioned my concerns to his (very experienced) teacher and said that I'd so often felt the same at school and didn't feel that my teachers noticed my enthusiasm to try something. As a result I was never very confident at school. She assured me that she knew exactly what he was all about and made sure he got his turn at things.
Just before he finished in Reception, I had an amusing conversation with DS1 about how I thought he'd have to fend off attention from all the girls who'd want to be his wife when he was a man as he's so lovely () and he told me "Well, I would pick the one at the back who's the quietest because she'd be the one who'd want me the most. Mrs X (teacher) always says that the quiet ones at the back may want a turn just as badly as the noisy ones at the front, and she always notices that."
I was so thrilled that I actually put that little story in her Thank you card and when I saw her in September, she came to say how much she loved what I'd written in her card - it was clearly she appreciated being so appreciated!!
DS is now in Year 1 and his confidence has grown so much and I like to think it was all down to Mrs X and her ability to see past the surface of all the individuals in her class.