Disclaimer: I think this is true for lots of professions and unfortunetly there's pretty much nowt all we can do about it for now, but...
Before my DC started school, I assumed TAs were the nursery nurses who pottered about the classroom, tidying books and overseeing the little one's colouring-in sessions. I now have three DC in primary school and realise just how underestimated they are. It's just dawned on me that the reason my DC get the support they do when they a) find some difficult and need extra help or b) excel in something and need a little 'push' to get them working at the next level, is because there is another adult in the room who can focus on either end of the academic spectrum when the teacher has to teach for the middle ones. I can't believe primary schools ever managed to provide challenging work for thirty children of varying abilities with just one teacher!
Teachers and TAs deserve a particularly good present this summer, I think. 
Anyway, that's my soppy post done for the night. 