Small school with combined year groups so you do tend to help your own DCs.
No problem with trips and craft, DD1 tended to wander up and say hi. DD2 did the
teen act and ignored my existence. She's a very sociable soul so I know most of girls in her class anyway.
Hearing DD1s Y2 class read was very depressing. DD1 is dyslexic and, although it took school until Y6 to acknowledge it, it was very obvious she was miles behind.
DD2's class had someone else and that was
for the opposite reason she'd write really glowing comments and, discreetly, say how good she was.
I guess we are such a small school that between what you pick up from your DCs, at the school gate, from play dates and PTA. We all know the majority of the pupils abilities so helping in class doesn't show us a lot we haven't already guessed.
I could see it being an issue in a bigger school, especially on that sets.