This thread reminds me of the huge amount of moaning I have done in the last four years.
Year 1: I bloody well did contribute to the class collection, 3 quid each - the organiser left my DD off the card 
I had also got my DD to decorate a lovely cloth bag - she did herself and the teacher. It was beautiful. The teacher put it to one side and never said thank you to DD who was heartbroken

Year 2: We all contributed a poem to a book which cost two quid each
- a different organiser forgot to put my kid's photo in it 
Year 3: Class plant two quid each and we lso did own thing.
Year 4: Organisers asked for 18 quid - yes you read that correctly - per person...So 400 quid in total
for a bespoke photo of the whole class printed onto posh metal so it was a photo but like a 'work of art' 
We paid it - I think most did - the teacher was awesome and lived and breathed the kids, will never see her like again.
And don't get me wrong - the photo took ages as two parents photoed each child individually in a makeshift studio - mine of course had head against hand in a bored expression
then another parent spent hours putting them all together in a row then the metal itself was sixty quid odd 
But four hundred quid? FOUR HUNDRED QUID?
it transpired the photographer/graphic designer etc were working for scale so some (do not know how much) went to them and the teacher got this class photo...
IWBU but all I could think was - we could have sent her to a spa/weekend away for that much rather than a posh metal photo of class of 2012 - and will she realise it cost 400 quid?!!!
as others have said she no doubt did not care and probably treasured the photo look at our kids, they beat every other class past and future but I still ended up buying her something personal and getting DD to make her something
- because I was worried she would not feel appreciated.
Bloody ridiculous I know.